Which biconditional is not a good definition
A: an angle is obtuse if and only if the measure is greater than 180
B: an angle is a right angle if and only if it’s measure is 90
C: an angle is acute if and only if it’s measure is between 0 and 90
D: two angles are congruent if and only if their measures are the same
1 answer
Option A: an angle is obtuse if and only if the measure is greater than 180.