Activity: Classifying Triangles
Essential question: How can you classify triangles in the coordinate plane?
Recall that triangles can be classified by their side lengths. A scalene triangle has no congruent sides, an isosceles triangle has at least two congruent sides, and an equilateral triangle has three congruent sides.

Find the length of each side using the measurement tool.
Record each side length.
Square each side length and record it.
Add the squares of the two smallest sides and record it.
Compare the squares of the two smallest sides to the square of the largest side.
Click on each triangle to view the angle measures and classify each triangle by it's angle measures.
What conjecture can you make concerning the square of the side lengths and the classification of the triangle by it's angle measures.