All angles are 60°., isosceles triangles close isosceles triangle Two sides are equal in length. Two angles are the same size., and scalene triangles close scalene triangle Each side is a ...

It categorizes triangles into equilateral, isosceles, scalene, obtuse, right, and acute based on their sides and angles. The video also covers the concept of congruency, demonstrating how two ...

The existence of irrational numbers is best explained with an isosceles right triangle—that is, a triangle with two sides of an equal length that form a right angle.