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Angles 1 and 3 are directly across from each other. They are called vertical angles. They share only a vertex. They always measure the same. Therefore, if angle 1 measures 27 degrees, angle 3 will measure degrees. 1 2 4 3 Angles 2 and 4 are also directly across from each other. They are vertical too. They share only a vertex. They always measure the same. Therefore, if angle 2 measures 153 degrees, angle 4 will measure degrees. 1 2 4 3 Angles that make 180 degrees together are called supplementary angles. If we know the measure of one angle, we can subtract from 180 to find the missing angle. 180 - 50 = o o 50 o o Angles that make 180 degrees together are called supplementary angles. If we know the measure of one angle, we can subtract from 180 to find the missing angle. 180 - 112 = o 112 o o o Angles that make 180 degrees together are called supplementary angles. If we know the measure of one angle, we can subtract from 180 to find the missing angle. 180 - 81 = o o x 81 o o Angles that make 180 degrees together are called supplementary angles. If we know the measure of one angle, we can subtract from 180 to find the missing angle. 180 - 52 = o o x 52 o o Angles that make 90 degrees together are called complementary angles. If we know the measure of one angle, we can subtract from 90 to find the missing angle. 90 - 25 = o o x o 25 o Angles that make 90 degrees together are called complementary angles. If we know the measure of one angle, we can subtract from 90 to find the missing angle. 90 - 40 = o o x o 40 o The two indicated angles are x = supplementary angles complementary angles vertical angles o x 28 o The two indicated angles are x = x supplementary angles complementary angles vertical angles o 52 o The two indicated angles are x = supplementary angles complementary angles x vertical angles o 52 o The two indicated angles are x = x o supplementary angles complementary angles vertical angles o 141 o The two indicated angles are x = supplementary angles complementary angles x vertical angles o 52 o Angle 1, angle 2, and angle 3 equal 360 degrees.
Angles 1 and 2 form complementary angles adjacent angles supplementary angles vertical angles 1 3 2 Solve for x. x = 2x + 6 28 o |