Find the value of x. then find the measure of each labeled angle. (answer choices below! ) a) x= 15; both labeled angles are 55°. b) x= 25; both labeled angles are 65°. c) x= 37.5; the labeled angles are 37.5° and 142.5°. d) x= 37.5; the labeled angles are 77.5° and 102.5°.