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If the radius of a circle is 55 inches, what is the area, circumference, and the diameter?

Answer 1

James Atkins

Diameter: 110 inches
Area: #3025pi# inches squared
Circumference: #110pi# inches

Diameter: #2r rarr# #r# represents the radius

#55*2=110 rarr# 110 inches would be the diameter

Area: #pir^2#

#55^2pi=3025pi rarr# #3025pi# would be the area

Circumference: #2pir# or #2d rarr# #d# represents the diameter

#110*pi=110pi#

If you are using an approximation for #pi#, such as 3.14, 3.14159 or #22/7#, multiply 3025 and 110 by the approximations instead of leaving it in terms of #pi#.

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Answer 2

Allison Allen

The area of the circle is ( A = \pi r^2 ), where ( r ) is the radius.
The circumference of the circle is ( C = 2 \pi r ).
The diameter of the circle is ( d = 2r ).

Given that the radius ( r = 55 ) inches, we can compute these values:

Area: ( A = \pi \times (55)^2 ) square inches
Circumference: ( C = 2 \pi \times 55 ) inches
Diameter: ( d = 2 \times 55 ) inches

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.