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Pairs of Angles
Certain pairs of angles are important in geometry. Two of these pairs are
complementary angles and supplementary angels.
If the sum of the measures of two angles equals 90o, the angles are
complemetary. When complementary angles are placed next to each
other, they form a right angle.
For more information about this and other math topics, come to the Math Lab 722-6300 x 6232. Caproiu & Hall, 2000
90o
50o + 40o = 90o
40 o
50 o
Complemetary Angles
o
When the sum of the measures of two angles is 180 , the angles are
supplementary. When supplementary angles are placed next to each
other, they form a line.
180o
48o +132o =180o
132o
48 o
Supplementary angles
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