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Sergeeva-Olga [200]
3 years ago
12

6. a semicircle has as its diameter the hypotenuse of a right triangle shown below. determine the area of the semicircle to the

nearest tenth of a square centimeter. show how you arrived at your answer.
Mathematics
1 answer:
jeyben [28]3 years ago
7 0

Answer:

A = 137.3cm^2

Step-by-step explanation:

Given

See attachment

Required

The area of the semicircle

First, we calculate the hypotenuse (h) of the triangle

Considering only the triangle, we have:

\cos(68) = \frac{7}{h} --- cosine formula

Make h the subject

h = \frac{7}{\cos(68)}

h = \frac{7}{0.3746}

h = 18.7

The area of the semicircle is then calculated as:

A = \frac{\pi h^2}{8}

This gives:

A = \frac{3.14 * 18.7^2}{8}

A = \frac{1098.03}{8}

A = 137.3cm^2

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