Area of a Parallelogram Demonstration
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- Algebraic model for the changing area of a right triangle
- An excircle of a triangle is externally tangent to a side of the triangle and tangent to the extensions of the other two sides. Each triangle has three excircles.
- Transformations Exercise 1
- Measured Triangle w Draggable Vertices
- BennettGauthier_TestingSimilarityTheorems