(x - 40) and (x - 30) are measures of complementary angles . Find the measure of each . Share with your friends Share 0 Zelfa Mariyam answered this Angle a + angle b is complementary angles ie. 70-40 and 90-30 =90degree a=70-40 + b=90-30 = 90degree 30+60=90degree 0 View Full Answer