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April 18, 2015

April 18, 2015

Posted by **Ansley** on Sunday, December 19, 2010 at 7:46pm.

- trig -
**bobpursley**, Sunday, December 19, 2010 at 8:04pmYou have ASA. Solve the triangle. (getting the two other sides, law of sines).

Now, area of the triangle= sqrt(s(s-a)(s-b)(s-c)) where s is the half-perimeter (this is known as Heron of Alexandria's formula).

Now set it equal to 1/2 Base*height,or

area= 1/2 (150)width river

setting the two areas equal, you can find the width of the river

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