SOLUTION: How do you find the area of a triangle if two sides are 4 inches and 5 inches and the included angle is 120 degrees?
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Question 253199: How do you find the area of a triangle if two sides are 4 inches and 5 inches and the included angle is 120 degrees?
Answer by drk(1908) (Show Source): You can put this solution on YOUR website!
The formula you need here is
(i)
where a and b are the sides and C is the "included" angle.
From (i) we have
sin(120) = sqrt(3) / 2
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