Posted by **Akash** on Wednesday, May 12, 2010 at 2:02am.

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 -
**Akash**, Wednesday, May 12, 2010 at 4:03am
I'm waiting for my answer

- 11th Grade Maths -
**drwls**, Wednesday, May 12, 2010 at 6:45am
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 -
**Akash**, Wednesday, May 12, 2010 at 1:39pm
Thank You but i did before you anyways thx

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