Thursday 30 June 2016

ANGLES 1


If x-150 and 4x + 450 are complementary angles, find the value of x.

solution

Complementary angles add up to 900.

so,  x-150 + 4x + 450 = 900.
so,  x + 4x + 450 - 150 = 900.
so,  5x + 300 = 900.
so,  5x = 900 -  300
so,  5x = 600

so,  5x = 6012
       5       5

Hence x = 12

TRY THIS...............


If 3x - 120 and 2x + 770 are complementary angles, find the value of x.

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