 
Complementary angles add to 90° 
Try these: Check your answer by holding the mouse cursor over the black box 10° and ____° are complementary angles 
25°, 5°, and ____° are complementary angles
x°, x°, and x° are identical complementary angles. Each is ____
Supplementary angles add to 180° 
Try these: Check your answer by holding the mouse cursor over the black box 40° and ____° are supplementary angles
55°, 35°, and ____° are complementary angles
x°, x°, x°, and x° are identical supplementary angles. Each is ____
More problems: 
 x = ____ x = ____ x = ____ x = ____
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