1. THE SQUARE

2. What makes a quadrilateral a square?
S 1) BOTH pairs of opposite sides are parallel (slope)
S 2) BOTH pairs of opposite sides are congruent (length-distance)
A 3) BOTH pairs of opposite angles are congruent (same degree measure)
A 4) SAME SIDE interior angles (consecutive angles) are supplementary
(add to 180 degrees)
D 5) DIAGONALS bisect each other(cut each other in half, at the midpoint,
making congruent parts)
D 6) 1 diagonal splits the parallelogram into 2 congruent triangles
plus Rectangle properties:
S/A 1) 4 right angles (consecutive sides perpendicular)
D 2) diagonals congruent in length (distance)
plus Rhombus properties:
S 1) All sides equal in length (distance)
A 2) Diagonals bisect the ANGLES to which they are drawn (split the angle in half)
D 3) Diagonals are perpendicular(slope)