Question

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Answer 1

Answer:

1075 square inches

Formulae:

r = 18.5d = 37C = 116

A = πr2 = π(d2)2

A = C24π

π = 3.1415

A = area

C = circumference or perimeter

r = radius, d = diameter

Solution Steps:

Area of a circle in terms of radius:

Area = π·r2 = 3.14·18.52 = 1075 square inches(*)

Area of a circle in terms of diameter:

Area = π·(d2)2 = 3.14·(372)2 = 3.14·(18.5)2 = 1075 square inches(*)

Area of a circle in terms of circumference:

Area = C24π = 116.224π = 13502.44(4·3.14) = 13502.4412.56 = 1075 square inches

Answer 2

Answer:

A≈1075.21

Step-by-step explanation

The Diameter goes all the way across the circle and you need the radius to find the area, so you split the diameter in half and multiply by pi. A=πr^2

Sometimes teachers prefer if you multiply by 3.14 instead of pi so that would be 1074.665.

(Full pi answer steps)-

Split the diameter(37) in half(18.5) Take 18.5 and take it up to the second power (18^2 or 18 times 18=342.25) Then multiply by pi(π) Leaving you with A≈1075.21

(3.14 answer steps)-

Split the diameter(37) in half(18.5) Take 18.5 and take it up to the second power (18^2 or 18 times 18=342.25) Then multiply by 3.14. This leaves you with the answer A≈1074.665

(The equal sign is kinda squiggly because it doesn't equal exactly those answers)

Someone, please correct me if I'm wrong about this answer