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Someone help me out plss

Someone help me out plss-example-1
User Max
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Answer: C) 611 square miles

Explanation:

Create a perpendicular from the vertex (A) to the base (BC) which creates a 30-60-90 triangle on the right side. Label this point D.

Use the 30-60-90 triangle rules (b - b√3 - 2b) to calculate the height of the triangle.

2b = 47 --> b = 23.5

AD = b√3 = 23.5√3

Area of a triangle = (1/2) base x height

= (1/2) 30 x 23.5√3

= 610.5479

≈ 611

User Chanu Panwar
by
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