Which statement is true about all parallelograms? A. The diagonals are congruent.
B. The area is the product of two adjacent sides.
C. The opposite angles are congruent.
D. The diagonals are perpendicular to each other.

How many sides does a regular polygon have if each exterior angle measures 72a.3b.4c.5d.6

What is the first step of an indirect proof of a number that is divisible by two

A, b, c, and d have the coordinates (-8, 1), (-2, 4), (-3, -1), and (-6, 5), respectively. which sentence about the points is true? a. a, b, c, and d lie on the same line. b. and are perpendicular lines. c. and are parallel lines. d. and are intersecting lines but are not perpendicular. e. and are parallel lines.