Which biconditional is NOT a good definition?
A; An angle is obtuse if and only if its measure is greater than 180.<<<<<<
B; An angle is a right angle if and only if its measure is 90
C; An angle is acute if and only if its measure is between 0 and 90
D; Two angles are congruent if and only if their measures are the same.
I put way too much faith in random people on the internt.
A is the correct answer.
An obtuse angle has measure greater than 90, not 180.