Solve for β
\beta =112
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180+158+158+2\beta =720
Add 90 and 90 to get 180.
338+158+2\beta =720
Add 180 and 158 to get 338.
496+2\beta =720
Add 338 and 158 to get 496.
2\beta =720-496
Subtract 496 from both sides.
2\beta =224
Subtract 496 from 720 to get 224.
\beta =\frac{224}{2}
Divide both sides by 2.
\beta =112
Divide 224 by 2 to get 112.
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