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3 years ago

Plz help me hdsbsusbd

Mathematics

1 answer:

satela [25.4K]3 years ago

6 0

The area of the circle 171.94 cm (rounded to the nearest whole would be 172 cm)

A= πr²
A= 3.14 (7.4)²
A= 3.14 (54.76)
A= 171.94 cm

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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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Area of circle: $27^2\pi=729\pi$

Circumference of a circle: $2\cdot 27\cdot \pi=54\pi$

Area of sector: $27^2\pi\cdot \frac{80}{360}=162\pi$

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

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