11th Grade Maths

The difference between the two acute angles of a right- angled triangle is 2 π/5 radians. Express the angles in degrees.
I’ve multipled 2 π/5 * 180/ π and got the result 72 degree But the answer is 81 degree and 9 degree. Please explain me!!!

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  1. I'm waiting for my answer

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  2. They ask for two angles. Their sum is 90 degrees and their difference is 2 pi/5 radians or 72 degrees.

    All you did was convert the difference to degrees. You did that right, but that was not the question.

    A + B = 90
    A - B = 72
    2A = 162
    A = 81
    B = 90 - 81 = 9

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  3. Thank You but i did before you anyways thx

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  4. superb solution sir short & sweet...

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  5. why we should 2pie/5*180/pie

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  6. Thnx

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  7. take one angle as x and other 90-x so , 2pi/5=72deg so, x-(90-x) =72 x=81 and 90-x=9 , so angle1=81deg and angle2=9deg

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  8. Good and short

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  9. The difference between the two acute angles of right triangle is 36degree find these angles in radians and degrees

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