At the end of this activity, students should be able to: find the diagonal of a square - find the height of an equilateral triangle - find the area of an equilateral triangle - find the area of a square, given the diagonal - use the Pythagorean theorem to solve real-world problems - find the radii of inscribed and circumscribed circles about an equilateral triangle - find the distance between two points in a coordinate system.

Originally released by Learnetic, 2016.