1: Equilateral means all sides are the same length.
4: These two angles are opposite each other in the rhombus.
6: All sides are congruent in a rhombus.
31: Look for the perpendicular marking in the sketches on the Quadrilaterals slide.
32: Look for the congruency markings in the sketches on the Quadrilaterals slide.
33: Read the Features column on the Quadrilaterals slide.
43: Each angle in a rectangle is 90°.
50: The diagonals of a square each cut the square in half.
61: All four sides of a rhombus are congruent.
65: A shape with all four sides congruent is called a rhombus.
66: A shape with four equal sides and four equal angles is called a square.
71: The diagonals of a square are congruent.
75: Each diagonal of a square is longer than the sides of the square.