Answer: 124.1 feet
An isosceles triangle is one which has two equal sides and two equal angles.
Area of triangle = ab SinC where a and b are the sides, and C is the given included angle.
From the given question, a = b = 18 feet and C = 50°.
Then, Area of this part of the roof = x 18 x 18 x Sin 50°
= x 18 x 18 x 0.7660
= 162 x 0.7660
= 124.092
The area of this part of the roof is 124.1 feet.
Explanation:
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