3 years ago

Find the missing number:.. a),b),c)

Mathematics

1 answer:

EleoNora [17]3 years ago

8 0

Answer:

A = 10 B = 20 C = ?

Step-by-step explanation:

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HELP DUE IN 10 MINS!

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$\checkmark \text{B. The area of the circle is } 729\pi,\\\checkmark \text{D. The arc length of the sector is } 12\pi$

Step-by-step explanation:

Area of a circle with radius $r$ : $r^2\pi$

Circumference of a sector with radius $r$ : $2r\pi$

Area of sector with angle $\theta$ : $r^2\pi\cdot \frac{\theta}{360}$ .

Arc length of sector with angle $\theta$ : $2r\pi\cdot \frac{\theta}{360}$

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Arc length of sector: $2\cdot 27\cdot \pi \cdot \frac{80}{360}=12\pi$

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