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Resource Name |
Topic (Course) |
Technology |
Type |
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Rating |
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Two Minimum Length Problems an...
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Centers of triangles (Geometry) |
Sketchpad |
Activity |
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 [0]
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A guided exploration of minimum distances from vertices of a triangle or quadrilateral to a point within the figure, using Geometer's Sketchpad.
More: lessons, discussions, ratings, reviews,...
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Chords in a Circle
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Chords (Geometry) |
Sketchpad |
Activity |
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[0]
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Students construct chords in a circle and manipulate them to discover various properties. The link to the activity itself is to a zip file that contains a pdf file of the activity.
This i...
More: lessons, discussions, ratings, reviews,...
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Examining Angles in Circles
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Chords (Geometry) |
Sketchpad |
Tool |
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[0]
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Investigate central angles, inscribed angles, angles formed by a tangent and chord, angles formed by intersecting chords, angels formed by two secants, angles formed by a tangent and a secant, and ang...
More: lessons, discussions, ratings, reviews,...
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Examining Segments in Circles
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Chords (Geometry) |
Sketchpad |
Tool |
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[0]
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Investigate the segment relationships in circles relating to chords, secants and tangents.
More: lessons, discussions, ratings, reviews,...
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Conic_Connections
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Circles (Algebra II) |
Sketchpad |
Tool |
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 [1]
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The user manipulates a plane and double-napped cone to generate graphs and equations of conic sections. Eccentricity, foci, and directrices are also illustrated in both 2- and 3-D.
More: lessons, discussions, ratings, reviews,...
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A Continuation of Minimum Peri...
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Circles (Geometry) |
Sketchpad |
Activity |
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[0]
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A further guided exploration of triangles inscribed within triangles, using Geometer's Sketchpad.
More: lessons, discussions, ratings, reviews,...
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A Japanese Temple Problem
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Circles (Geometry) |
Sketchpad |
Activity |
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[0]
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In this guided Geometer's Sketchpad exploration, students use their knowledge of tangent circles to discover a relationship between the radii of three circles which are mutually tangent to each other ...
More: lessons, discussions, ratings, reviews,...
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Circumscribed Triangles
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Circles (Geometry) |
Sketchpad |
Activity |
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[0]
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A guided exploration of the relationship between the midpoints of a triangle inscribed in a circle, and the center of the circle, using Geometer's Sketchpad.
More: lessons, discussions, ratings, reviews,...
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Determining the Uniqueness of ...
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Circles (Geometry) |
Sketchpad |
Activity |
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[0]
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Are there a certain number of arbitrary points such that there exists a unique circle through them? To explore and conjecture an answer to this question, students will construct circles passing throug...
More: lessons, discussions, ratings, reviews,...
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Inscribed Triangles
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Circles (Geometry) |
Sketchpad |
Activity |
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[0]
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A guided exploration, using Geometer's Sketchpad, of a property of triangles inscribed in a circle.
More: lessons, discussions, ratings, reviews,...
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Kissing Circles
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Circles (Geometry) |
Sketchpad |
Activity |
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[0]
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This guided exploration, using Geometer's Sketchpad, examines the properties of tangent circles ("osculating" or kissing circles).
More: lessons, discussions, ratings, reviews,...
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Paper Cup Mathematics
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Circles (Geometry) |
Sketchpad |
Lesson Plan |
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[0]
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Imagine a discarded paper cup rolling on its side of a flat surface. What geometric shape does the path of the cup form?
Students investigate this question and begin the activity by experimenting wit...
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Area of a Circle
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Circles (Geometry) |
Sketchpad |
Tool |
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 [1]
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This is a downloadable Geometer's Sketchpad file that illustrates the source of the area formula for a circle.
More: lessons, discussions, ratings, reviews,...
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Areas of Regular Polygons and ...
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Circles (Geometry) |
Sketchpad |
Tool |
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[1]
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Students manipulate the number of sides in a regular polygon, develop a formula relating the area and perimeter of the polygon, and use their result to develop a formula relating the circumference ...
More: lessons, discussions, ratings, reviews,...
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Center-Radius Form
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Circles (Geometry) |
Sketchpad |
Tool |
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[0]
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This is a downloadable Geometer's Sketchpad file that illustrates the source of the center-radius area of a circle formula. Scroll halfway down this page in order to find the link to download this fil...
More: lessons, discussions, ratings, reviews,...
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Types of Triangles
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Classify geometric objects (Math 3) |
Sketchpad |
Tool |
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[0]
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This Sketchpad sketch accompanies the tPoW, Types of Triangles. Students are able to drag and manipulate four triangles and by noticing what happens they classify the triangles as either scalene, isos...
More: lessons, discussions, ratings, reviews,...
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Tipos de Triángulos
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Classify geometric objects (Math 3) |
Sketchpad |
Technology PoW |
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[0]
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Los estudiantes utilizan un dibujo de GSP o una página interactiva de la red para arrastrar y manipular cuatro triángulos: uno isósceles, uno agudo, uno equiángulo, y otro recto.
versión ...
More: lessons, discussions, ratings, reviews,...
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Types of Triangles
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Classify geometric objects (Math 3) |
Sketchpad |
Technology PoW |
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[3]
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Students use a GSP sketch or an interactive web page to drag and manipulate four triangles. They identify one of each type: scalene, isosceles, equilateral, and right.
NOTE: A free...
More: lessons, discussions, ratings, reviews,...
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Types of Triangles
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Classify geometric objects (Math 4) |
Sketchpad |
Tool |
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[0]
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This Sketchpad sketch accompanies the tPoW, Types of Triangles. Students are able to drag and manipulate four triangles and by noticing what happens they classify the triangles as either scalene, isos...
More: lessons, discussions, ratings, reviews,...
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Tipos de Triángulos
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Classify geometric objects (Math 4) |
Sketchpad |
Technology PoW |
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[0]
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Los estudiantes utilizan un dibujo de GSP o una página interactiva de la red para arrastrar y manipular cuatro triángulos: uno isósceles, uno agudo, uno equiángulo, y otro recto.
versión ...
More: lessons, discussions, ratings, reviews,...
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Types of Triangles
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Classify geometric objects (Math 4) |
Sketchpad |
Technology PoW |
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[3]
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Students use a GSP sketch or an interactive web page to drag and manipulate four triangles. They identify one of each type: scalene, isosceles, equilateral, and right.
NOTE: A free...
More: lessons, discussions, ratings, reviews,...
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Color by Numbers
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Commutative (Math 5) |
Sketchpad |
Tool |
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[0]
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Students investigate patterns produced on a grid of numbers generated through addition and multiplication of the whole numbers. The focus is on elementary number theory concepts such as even/odd, fact...
More: lessons, discussions, ratings, reviews,...
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Grouping I and II
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Commutative (Math 5) |
Sketchpad |
Tool |
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[0]
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Grouping I: The goal of this activity is twofold. First, it introduces students to Sketchpad's most important tools and menu commands. Second, it helps students appreciate how grouping objec...
More: lessons, discussions, ratings, reviews,...
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Reach the Target
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Comparing & ordering (Math 3) |
Sketchpad |
Tool |
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 [1]
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Students use their knowledge of place value to identify the locations of unlabeled tick marks along number lines. These locations are exact to units, tenths, and all the way up to hundred thousandths.
More: lessons, discussions, ratings, reviews,...
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Reach the Target
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Comparing & ordering (Math 5) |
Sketchpad |
Tool |
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[1]
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Students use their knowledge of place value to identify the locations of unlabeled tick marks along number lines. These locations are exact to units, tenths, and all the way up to hundred thousandths.
More: lessons, discussions, ratings, reviews,...
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