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Angles A and B are complementary angles. Find angles A and B.
Angle A = 4x+31
Angle B =-2x+44
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Complementary angles sum up to 90 degrees
(4x+31) + (-2x+44) = 90 degrees
4x + 31 - 2x + 44 = 90
4x - 2x + 75 = 90
2x = 90 - 75
2x = 15
x = 15/2 = 7.5 degrees.
Angle A is 4x+31 = 4*7.5+31 = 30+31 = 61 degrees.
Angle B is -2x+44 = -2*7.5 + 44 = -15 + 44 = 29 degrees.
CHECK. 61 + 29 = 90 degrees. ! correct !
Solved.
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- Angles basics
- Vertical angles
- HOW TO solve problems on supplementary, complementary or vertical angles - Examples
- Solved problems on supplementary and complementary angles
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