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Soloha48 [4]
3 years ago
14

What is the approximate area of the shaded region in the given square containing 2 semicircles? (Use * 3.14.) 10 cm 0 21.5 squar

e centimeters O 50 square centimeters O 78.5 square centimeters O 100 square centimeters

Mathematics
2 answers:
Crazy boy [7]3 years ago
8 0

Answer:

Subtract the circle from the square

Step-by-step explanation:

(10× 10) - 25pi

lakkis [162]3 years ago
4 0

Answer:

yes

Step-by-step explanation:

bcuz

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b = 2.77 m
A = 43.0°
C = 111.1°

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b^2 = a^2 + c^2 -2ac \cos B \\ \\&#10;b = \sqrt{a^2 + c^2 -2ac \cos B} \\ \\&#10;b = \sqrt{4.33^2 + 5.92^2 - 2(4.33)(5.92) \cos 25.9} \\&#10;b = 2.7708\ m

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Find angle A with sine law

\displaystyle&#10;\frac{\sin A}{a} = \frac{\sin B}{b} \\ \\&#10;\sin A = \frac{a \sin B}{b} \\ \\&#10;A = \sin^{-1} \left[ \frac{a \sin B}{b}  \right] \\ \\&#10;A = \sin^{-1} \left[ \frac{4.33 \sin 25.9}{2.7708}  \right]  \\ \\&#10;A = 43.0467020

Find C with angles in triangle sum to 180

A + B + C = 180
C = 180 - A - B
C = 180 - 43.0467020 - 25.9
C = 111.1
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