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Pani-rosa [81]
2 years ago
7

8. For circle A, the circumference is 31.4 ft. What is the area? Use 3.14 for pi

Mathematics
2 answers:
telo118 [61]2 years ago
7 0

Answer:

\huge\boxed{\sf A = 78.5\ ft\²}

Step-by-step explanation:

Circumference = C = 31.4 ft

We know that,

<h3>C = 2πr</h3>

Where, r is the radius

31.4 = 2(3.14)r

31.4 = 6.28(r)

Divide 6.28 to both sides

31.4/6.28 = r

5 ft. = r

<h3>r = 5 ft.</h3>

Now,

<h3><u>Finding area:</u></h3>

A = πr²

A = (3.14)(5)²

A = (3.14)(25)

<h3>A = 78.5 ft²</h3>

\rule[225]{225}{2}

tensa zangetsu [6.8K]2 years ago
7 0
To solve this problem, you need to find a radius... Circumference=2(3.14)(r)

2(3.14)=6.28

31.4/6.28=5=radius

A=(3.14)(r^2)

A=(3.14)(5^2)=78.5

Area= 78.5 ft^2
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