Which biconditional is not a good definition?
a) a whole number is odd if and only if the number is not divisible by 2
b) an angle is straight if and only if it is measure is 180°
c) a whole numbers even if and only if it is divisible by two
d) a ray is a bisector of an angle if and only if it's blitz the angle into two angles

Which statement explains how you could use coordinate geometry to prove the opposite sides of a quadrilateral are congruent? a. use the slope formula to prove the slopes of the opposite sides are the same. b. use the slope formula to prove the slopes of the opposite sides are opposite reciprocals. c. use the distance formula to prove the lengths of the opposite sides are the same. d. use the distance formula to prove the midpoints of the opposite sides are the same.