Posted by Akashdeep Singh on Wednesday, July 21, 2010 at 1:25pm.
2π/5 radians = 72°
so let one angle be x
then the other is x+72
we know x + x+72 = 90
2x = 18
x = 9
So the two angles are 9° and 81°
x+9+81=90
x+90=90
x=90-90
x=o
x+9+81=90
x+90=90
x=90-90
x=o
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