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Area of triangle, using two line lengths and interior angle

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The height (h) of a triangle can be found through the application of trigonometry.
(h = a*sin(¥ã))

A = (1/2)*b*h = (1/2)(a*b*sin(¥ã))

a, b : line length
¥ã : interior angle between line a and b

*** Âü°í¹®Çå[References] ***

https://en.wikipedia.org/wiki/Triangle
A = (1/2)*(a*b*sin(¥ã))
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