11th Grade Maths

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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!!!

  • 11th Grade Maths -

    I'm waiting for my answer

  • 11th Grade Maths -

    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

  • 11th Grade Maths -

    Thank You but i did before you anyways thx

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