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Posted by **Akashdeep Singh** on Wednesday, July 21, 2010 at 1:25pm.

- Maths 11th Grade -
**Reiny**, Wednesday, July 21, 2010 at 1:59pm2π/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°

- Maths 11th Grade -
**kajal**, Wednesday, December 8, 2010 at 10:13amx+9+81=90

x+90=90

x=90-90

x=o

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