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April 20, 2015

April 20, 2015

Posted by **miguel** on Tuesday, November 16, 2010 at 6:38pm.

- math -
**Damon**, Tuesday, November 16, 2010 at 7:20pmthey add up to 360 degrees

(10x-25) + 10 x + 3 x^2 +2 x^2 = 360

5 x^2 + 20 x -25 = 360

5 x^2 + 20 x - 385 = 0

x^2 + 4 x - 77 = 0

(x-7)(x+11) = 0

x = 7

forget negative 11, no such angle needed

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