Mathematics

23 June, 22:36

Which biconditional is NOT a good definition?

a. An angle is a right angle if and only if its measure is 90°

b. An angle is acute if and only if its measure is less than 90°

c. Two angles are congruent if and only if its measure are the same.

d. An angle is obtuse if and only if its measure is greater than 180°

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