State whether the angles are complementary, supplementary, or neither. ∠ACF and ∠FCB A. neither B. complementary C. supplementary
Know what complementary and supplementary mean?
\(\angle A + \angle B =180^\circ\) means supplementary. \(\angle A + \angle B =90^\circ\) means complementary.
complementary if you see they both are less than 90
FCB is 90 and ACF is less than 90
Umm... less than 90 is just acute.
A little confirmation of the definitions I gave: http://www.mathsisfun.com/definitions/supplementary-angles.html http://www.mathsisfun.com/geometry/complementary-angles.html Just because two angles are acute does not mean they are complementary. 80 + 80 = 160. 80 is acute, but two of them are more than 90.
Join our real-time social learning platform and learn together with your friends!