Show that each statement is false by providing a counterexample.
(a) If 21 and 22 are supplementary angles, then one of them must be acute.
(b) If the measures of ZR, ZS, and T sum to 180°, then one of the angles must be obtuse.
(c) If mWXZ- 60°, and point Y is in the interior of mWXZ, then mWXY=30° and mYXZ=30°.
(d) If the perimeter of a rectangle is 48, then the length is 20 and the width is
Counterexample: length = width
