Question 204365: Can you help me solve this question: 1. Two sides of a triangle have lengths of 3 cm and 7 cm and meet at an angle of 60◦ . Find the area of the triangle.
Answer by RAY100(1637)   (Show Source):
You can put this solution on YOUR website! This theory has the name "SAS triangle area Theorem"
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It starts with any triangle given two sides and included angle.
The basis is ,,A = 1/2 b h,,, where h = altitude
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If we sketch the above triangle,,,sin a = h/side adjacent to angle,,,,
or,,, h=side *sin a
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if we substitute this into above,,A=1/2 ab*sin angle
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In this case,, A=1/2*3*7*sin60 = 9.09
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