Multiple Connections
Rose Mary Zbiek
	Width-length-perimeter graphs and width-length-area graphs. 
	(889, 1996)  628 - 634

A Geometric Approach to the Discriminant
R. Daniel Hurwitz
	Characterizing the number of real solutions to a quadratic equation by 
	investigating the intersections of a parabola and a line.
	(88, 1995)  323 - 325

Investigating Circles and Spirals with a Graphing Calculator
Stuart Moskowitz
	Activities involving parametric equations.
	(87, 1994)  240 - 243

Geometric Transformations - Part 2
Susan K. Eddins, Evelyn O. Maxwell, and Floramma Stanislaus
	Activities.  Coordinate approaches to transformations utilizing matrices.
	(87, 1994)  258 - 261, 268 - 270

A Quadrilateral Hierarchy to Facilitate Learning in Geometry
Timothy V. Craine and Rheta N. Rubenstein
	Creating a "family tree" for quadrilaterals to enable generalization 
	of results.  Analytic proofs are also involved.  
	(86,1993)  30 - 36

Using a Treasure Hunt to Teach Locus of Points
Linda Hayek
	Sharing teaching ideas.  Using geometric clues to find 
	hidden objects.  
	(86, 1993)    133 - 134

Physical Modeling of Basic Loci
Patricia Frey-Mason
	Using students and groups of students to represent geometric objects.  
	(86, 1993)    216

Square Circles
Judith A. Silver
	Examining the set of all points equidistant from a fixed point 
	using metrics different from the usual metric in a plane.  
	(86, 1993)    408 - 410

Hidden Treasures in Students' Assumptions
Monte Zerger
	Finding the distance between two points separated by an obstacle.  
	Geometric and trigonometric approaches.  
	(86, 1993)    567 - 569

Where is My Reference Angle?
Joanne Staulonis
	A manipulative for demonstrating the concept of a reference angle.
	(85, 1992)    537

Folding Perpendiculars and Counting Slope
Ann Blomquist
	Sharing Teaching Ideas.  Folding activities to discover relations
	between slopes of perpendicular lines.
	(85, 1992)    538 - 539

Is the Graph of y = kx Straight?
Alex Friedlander and Tommy Dreyfus
	Loci in non-Cartesian coordinate systems.
	(84, 1991)  526 - 531

Euclid and Descartes: A Partnership
Dorothy Hoy Wasdovich
	Integrating coordinate and synthetic geometry.
	(84, 1991)  706 - 709

Coordinate Geometry: A Powerful Tool for Solving Problems
Stanley F. Tabak
	Contrasting synthetic and analytic proofs for three theorems.
	(83, 1990)  264 - 268

Which Method Is Best?
Edward J. Barbeau
	Synthetic, transformational, analytic, vector, and complex number
	proofs that an angle inscribed in a semicircle is a right angle.
	(81, 1988)    87 - 90

Interdimensional Relationships
Joseph V. Roberti.
	A look at relationships suggested by the fact that the derivative of
	the area of a circle yields the circumference and the derivative of the
	volume of a sphere yields the surface area.
	(81, 1988)    96 - 100

Slope As Speed
James Robert Metz
	Activities to develop the concept.
	(81, 1988)    285 - 289

Another Approach to the Ambiguous Case
Bernard S. Levine
	Using the law of cosines to set up a quadratic equation.
	80, (1987)  208 - 209.

A Geometric Proof of the Sum-Product Identities for Trigonometric Functions
Joscelyn Jarrett
	Utilizing points on a unit circle.
	80, (1987)  240 - 244.

Rethinking the Ambiguous Case
Allen L. Peek
	Again relating the solution of the problem to the solution of a
	quadratic equation.
	80, (1987)  372.

Illustrating the Euler Line
James M. Rubillo
	Finding the coordinates of the points on the line.
	80, (1987)  389 - 393.

Interpreting and Applying the Distance Formula
Richard J. Hopkinson
	Applying the usual formula for the distance from a point to a line
	to the solution of several typical analytic geometry problems.
	80, (1987)  572 - 575, 579.

Distance From a Point to a Line
Donna M. and Enrique A. Gonzalez-Velasco
	A derivation of the formula.
	79, (1986)  710 - 711.

A Property of Inversion in Polar Coordinates
James N. Boyd
	A demonstration of the result that inversion preserves angle size. 
	78, (1985)  60 - 61.

The Geometry of Microwave Antennas
William R. Parzynski
	Reflective properties of parabolas and hyperbolas. An analytic approach.
	77, (1984)  294 - 296.

General Equations for a Reflection in a Line
J. Taylor Hollist
	An analytic development.
	77, (1984)  352 - 353.

Inversion in a Circle: A Different Kind of Transformation
Martin P. Cohen
	An analytic introduction to inversion.
	76, (1983)  620 - 623.

Two Derivations Of A Formula For Finding The Distance From a Point to A Line
George P. Evanovich
	A circle-radius method and a trigonometric method.
	72, (1979)  196 - 198.

Writing Equations For Intersecting Circles
Richard J. Hopkinson
	A method for guaranteeing that two circles will meet at points
	having integer coordinates.
	72, (1979)  296 - 298.

Computer Classification Of Triangles and Quadrilaterals - A Challenging
Application
J. Richard Dennis
	Computer application, uses coordinates of vertices.
	71, (1978)  452 - 458.

Dual Concepts - Graphing With Lines (Points)
Deloyd E. Steretz and Joseph L. Teeters    
	Point and line coordinates.
	70, (1977)  726 - 731.

Coordinates For Lines: An Enrichment Activity
Alan R. Osbourne
	Line coordinates in a plane.
	69, (1976)  264 - 267.

Equations Of Geometric Figures
Carl S. Johnson, M.M. Ahuja and Leonard Palmer
	The relation of the graphs of the union and the intersection of
	the figures F and G to the graphs of F and G.  Extended to writing
	equations for polygons and to higher dimensions.
	67, (1974)  741 - 743.

Mission - Tangrams
Charles E. Allen
	Activities dealing with coordinate systems, shape, congruence,
	similarity and congruence.
	66, (1973)  143 - 146.

A Mathematical Vignette
Courtney D. Young, Jr.
	A look at some analytic proofs.
	65, (1972)  349 - 353.

Circular Coordinates: A Strange New System Of Coordinates
Frederick K. Trask III
	A system in which points are represented as the intersection of circles.
	Applied mainly to curves which are best represented in polar form.
	64, (1971)  402 - 408.

What Points Are Equidistant From Two Skew Lines?
Alexandra Forsythe
	An analytic approach.
	62, (1969)  97 - 101.

Geometric Techniques For Graphing
Glen Haddock and Donald W. Hight
	Graphs of  f , g , f + g , f - g , etc.
	59, (1966)  2 - 5.

Discovery-Type Investigation For Coordinate Geometry Students
Mary Ellen Schaff
	System derived from a circle and a line.
	59, (1966)  458 - 460.

The Use Of Transformations In Deriving Equations Of Common Geometric Figures
Clarence R. Perisho
	Equations of figures having sharp corners.
	58, (1965)  386 - 392.

Coordinate Geometry With An Affine Approach
Harry Sitomer
	A brief overview.
	57, (1964)  404 - 405.

A Note On Curve Fitting
Joseph F. Santer
	Writing an equation for an angle.
	56, (1963)  218 - 221.

A Second Note On Curve Fitting
Joseph F. Santer
	Writing an equation for a broken line curve.
	56, (1963)  307 - 310.

Curves With Corners
Clarence R. Perisho
	Equations involving absolute values.
	55, (1962)  326 - 329.

Graphing Pictures
Margaret L. Carver
	Coordinates presented.
	52, (1959)  41 - 43.

Teaching Loci With Wire and Paint
Donald A. Williams
	Teaching aids for locus problems.
	51, (1958)  562 - 563.

The Functional Approach To Elementary and Secondary Mathematics
William A. Gager
	Some geometrical examples.
	50, (1957)  30 - 34.

Equations and Geometric Loci: A Logical Synthesis
W. Servais
	Relations, some set theory.
	50, (1957)  114 - 122.

Notes On Analytic Geometry
William L. Schaff
	Bibliography.
	46, (1953)  28 - 30.

Using Algebra In Teaching Geometry
Howard F. Fehr
	An analytic approach to geometry.
	45, (1952)  561 - 566.

Analytic Geometry: The Discovery Of Fermat and Descartes
Carl B. Boyer
	History and bibliography.
	37, (1944)  99 - 105.

A Lesson On The Parabola, With Emphasis On Its Importance In Modern Life
Chester C. Camp
	Analytic approach.  Applications.
	35, (1942)  59 - 63.

Analytic Geometry In The High School
Arthur F. Leary
	Material being taught at the time.
	33, (1940)  60 - 68.

A Geometric Representation
E. D. Roe, Jr.
	Analytic geometry in space.
	10, (1917-1918)  205 - 210.

H.J.L.
07/15/97
email:  00hjludwig@bsu.edu
home page: http://www.cs.bsu.edu/~hjludwig/