Khan Academy Static

What do we know about a triangle if two of the sides are congruent (an isosceles triangle) or all three are congruent (an equilateral)? What abut their angles? Let's find out.

7994_Classifying_triangles_by_angles.html

7995_Sum_of_interior_angles_of_a_polygon.html

7993_Classifying_triangles_.html