Marcel thinks that quadrilateral ABCD at the right has two pairs of congruent sides, but he does not have a ruler to measure the sides. How can he show that the quadrilateral has two pairs of congruent sides?
He can fold the quadrilateral in half both ways. If both sets of sides match, then they are congruent.
Richelle drew hexagon KLMNOP at the right. She thinks the hexagon has six congruent angles. How can she show that the angles are congruent without using a protractor to measure them?
Jerome drew a triangle with vertices S, T, and U. He thinks \(\angle TSU\) and \(\angle TUS\) are congruent. How can Jerome show that the angles are congruent without measuring the angles?