Geometry Activities
Click the topic you are studying to activate an engaging learning activity (Flash Player 7.0 or above required).
- Exterior Angles of a Polygon
Investigate the sum of the exterior angles of a polygon.
- Proving Two Triangles are Similar
Investigate the SAS Similarity Theorem, and see why there's no such thing as an SSA Similarity Theorem.
- Scale Factors and Similar Triangles
Investigate the relationship between the corresponding sides and angles of two similar triangles.
- Area of a Triangle
See a graphical explanation of why the formula works.
- Triangle Inequality
Can a triangle be formed from any 3 side lengths?
- Slope Triangles
Investigate the slope ratio in a right triangle.
- Angle Sum Theorem
Investigate the Angle Sum Theorem for a triangle.
- Transformations
Discover the relationships between reflections, rotations and translations.
- Secants
Discover a theorem about the secants of a circle.
- Conics
Explore a construction of hyperbolas and ellipses.
- The Pythagorean Theorem
Investigate two graphical proofs of the Pythagorean Theorem.
- Pantograph
Use a pantograph to investigate similarity.
- Conics - Parabola
Investigate how the positions of the focus and the directrix affect the shape of a parabola.
