Write the contrapositive of the conditional statement. determine whether the contrapositive is true or false. if it is false, find a counterexample. two angles measuring 180 are supplementary. a two angles not measuring 180 are not supplementary. true b two angles not measuring 180 are supplementary. false c non-supplementary angles are two angles not measuring 180. true d more than two angles measuring 180 are non-supplementary. true