Complementary angles
Two angles whose sum in 90 degrees
Complementary angles are two angles that add up to 90 degrees. In other words, when you add the measure of one angle to the measure of its complement, the sum is always 90 degrees.
For example, if one angle measures 30 degrees, then its complement measures 60 degrees because 30 + 60 = 90.
Complementary angles are often seen in right triangles where one angle is 90 degrees. One of the other two angles in a right triangle is always the complement of the first angle.
Complementary angles can also be used to find the measure of an unknown angle in a right triangle. If you know one angle is complementary to another, and you know the measure of one angle, you can subtract that from 90 to find the measure of the second angle.
In summary, complementary angles are two angles that add up to 90 degrees and are commonly used in right triangles. They are useful for finding the measure of unknown angles and for understanding the relationship between angles in a geometric figure.
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