ANGLE is eight TIMES its complementary angleConcept used:Two angles are said to be complementary angles if their SUM is 90ºCalculations:Let the required angle be yHence, its complementary angle is (90 − y)⇒ y = 8y × (90 - Y)⇒ y = 720 - 8y⇒ 9y = 720⇒ y = 720/9⇒ y = 80º∴ The measurement of the angle is 80º