Properties of Quads - Square's angles are congruent
Square
Square - a quadrilateral with four congruent sides and one right angle
Show that this definition implies that all angles in a square are right angles. Pictorial hint is below and there are at least two ways to approach it:
1. If we are only given the definition and know nothing else about squares, then showing that ADB and DAC are congruent and isosceles will help us reason about the angles in the square.
2. If we have already used #1 to prove that square is a parallelogram, we can now use the fact that AC || BD and CD || AB .