Dr. Carol J.V. Fisher's Homepage

ONE MATHEMATICAL CAT, PLEASE!
Topics in Geometry

These lessons incorporate GeoGebra,
which is free, multi-platform dynamic mathematics software
that joins geometry, algebra and calculus

ALL WEB EXERCISES OPEN IN A NEW WINDOW

These lessons have been updated to MathJax,
so they are now available to all major platforms and browsers.
Enjoy!

1.   Beginning Terminology, Points, Lines, and Planes
2.   GeoGebra Tutorial: Introduction to GeoGebra
3.   GeoGebra Worksheet: Triangles (Be patient—it's worth the wait!)
4.   Segments, Rays, Angles
5.   GeoGebra Tutorial: GeoGebra Basics
6.   Introduction to Polygons
7.   Interior and Exterior Angles in Polygons
8.   Quadrilaterals
9.   GeoGebra Worksheet: Quadrilaterals
10.   ‘If ... Then ...’ Sentences
11.   Contrapositive and Converse
12.   Proof Techniques
13.   Logical Equivalences and Practice with Truth Tables
14.   Applying Logical Equivalences to Algebraic and Geometric Statements
15.   Constructions
16.   GeoGebra Worksheet: Copying a Line Segment and an Angle
17.   GeoGebra Worksheet: Bisecting an Angle
18.   Introduction to the Two-Column Proof
19.   The Pythagorean Theorem
20.   More Terminology for Segments and Angles
21.   Angles: Complementary, Supplementary, Vertical, and Linear Pairs
22.   Equivalence Relations
23.   Triangle Congruence
24.   Relationships between Angles and Sides in Triangles
25.   Practice with Two-Column Proofs
26.   Is there an ‘SSA’ Congruence Theorem? No!
27.   More on Exterior Angles in Triangles
28.   Parallel Lines
29.   Parallelograms and Negating Sentences
30.   Introduction to Area and Perimeter
31.   Area Formulas: Triangle, Parallelogram, Trapezoid
32.   Similarity, Ratios, and Proportions
33.   Perimeters and Areas of Similar Polygons
34.   Two Special Triangles