
Similar Figures Activity
Standards/Benchmarks Alignment and Math Forum Resources


Alignment to Radnor Township School District Mathematics Standards and Benchmarks:
 Standard 1: Number and Operations Concepts
 Describe, represent, and apply numbers and their relationships and estimate and computer using mental strategies, paper and pencil, and technology.
 Benchmarks
 Use ratios to express parttopart and wholetowhole relationships (7, 8)
 Standard 2: Geometry and Measurement Concepts
 Apply the properties of one, two, and threedimensional geometric figures to describe, reason, and solve problems about shape, size, position, and motion of objects. Identify attributes, units, and systems of measurements and apply a variety of techniques, formulas, tools, and technology for determining measurements.
 Benchmarks
 is familiar with assorted twodimensional objects (7)
 identify similar and congruent shapes (6)
 determine and understand length (7)
 recognize similarity in twodimensional figures (8)
 measure angles using appropriate units
 reason proportionally in situations with similar figures
Correlation with the MathThematics textbook:
 Book 1
 p. 380 Exploring Ratios
 p. 397 Using Ratios
 p. 424 Comparing Shapes
 p. 429 Measuring Angles
 Book 2
 p. 76 Looking at Angles
 p. 313 Ratios and Proportions
 p. 411 Scale Drawings and Similarity
 p. 414 Unknown Measures in Similar Figures

 Book 3
 p. 202 Similar Figures
 p. 407 Angles and Triangles

Math Forum Resources:
Dr. Math
Teacher Exchange
Problems of the Week
Teacher2Teacher
Internet Mathematics Library
Other Web Resources:
Shelly Berman, Annie Fetter & Suzanne Alejandre
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