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shepuryov [24]
3 years ago
14

Find the area and circumference of a circle with a diameter of 30 ft​

Mathematics
1 answer:
Kazeer [188]3 years ago
7 0

Answer:

\large\boxed{C=30\pi\ ft,\ A=225\pi\ ft^2}

Step-by-step explanation:

The formula of a circumference of a circle:

C=d\pi

d - diameter

The formula of an area of a circle:

A=\pi r^2

r - radius

We have the diameter d = 30 ft. We know d= 2r.

Therefore r = 30 : 2 = 15 ft.

Substitute:

C=30\pi\ ft\\\\A=\pi(15^2)=225\pi\ ft^2

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Answer:

x = 25

Step-by-step explanation:

This is an equilateral triangle as all 3 angles are marked as equal.

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