Question

find 2/3 of its compliment

Answer 1

dear friend,
let the required angle be x
then it's complement angle = 90 - x
given , x / ( 90 - x ) = 2/3
3x = 2 * ( 90 - x )
3x = 180 - 2x
3x + 2x = 180
5x = 180
x = 180 / 5
x = 36 °
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