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Pi sorta equals 3.14
3.14 x 13
40.82 (Approximate, but not by much)
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∙ 11y ago
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What is the circumference of a circle if the radius is 13?
2 x 13 x pi = 81.68 Circumference of a circle = 2*pi*radius or pi*diameter Circumference = 2*pi*13 = 81.68140899
How do you find the perimeter and area of a circle?
perimeter (circumference): diameter times pi (3.14) area: radius times radius times pi (3.14) Area = pi*radius squared Circumference = 2*pi*radius or pi*diameter
What is the circumference of a circle whose area is 100 pi?
The formula for finding the area of a circle is pi times the radius squared. Let's find the radius of the circle. 100 pi/ pi= 100. Squarerooted, the radius is 10. The formula for finding the circumference of a circle is 2 times pi times the radius. So, plug in: 2 times pi times 10 equals 20 pi! Your final answer: 20 pi (or, if you use decimals, approximately 62.8)
Surface area of cone?
(pi times radius squared) plus (pi times radius times slant).
What is the circumference of a circle that has a radius of 38 inches in terms of pi?
The circumference C = 2 r times pi C = 76 inches times pi. pi = 3.141592654...
What is the circumference of a circle with a 13 diameter?
The circumference of a circle is Pi times the diameter. Pi = 3.1416 so 3.1416 x 13 = 40.84
What is the circumference of a circle that is 13 feet wide?
You can get the circumference of a circle using either the equation radius times 2 times Pi or diameter times Piand im guessing by wide you mean diameter.So 13 x 3.14 (Pi)3.14x 13------9423140-------4082then add the decimal40.82so 40.82 ft is your answer
What is pi times pi divided by pi plus pi minus pi times pi?
the same as pi squared, which is 9.86960440109
What is the area of a circle if it has a diameter which is 13 inches long?
The area of a circle is pi(r)^2 (Pi times r squared) r = (1/2) dSo if the diameter is 13, the radius is 6.5Now use the equation:A=pi(6.5)^2A=pi(42.25)A=132.73 square inches.
What is the radius of the circle if the circumference of the circle is 13 pi cm?
C = 2 pi r (divide by 2pi to both sides) C/2pi = r (substitute 13 pi cm for C) r = (13 pi cm)/(2 pi) = (13/2)(pi/pi) cm = 6.5 cm
What is the radius if a circle with circumference 13 ft?
C= pi*d 13=pi*d 13/pi=d r=d/2 r=13/(2pi)
How do you use pi to determine circumference?
Circumference = pi times the diameter, or pi times 2 times radius. Area = pi times (radius squared)
What is the circumference of a circle if the radius is 13?
2 x 13 x pi = 81.68 Circumference of a circle = 2*pi*radius or pi*diameter Circumference = 2*pi*13 = 81.68140899
How do you find the pi circumference and area of circles?
Area=pi times radius squared Circumference=pi times diameter or pi times radius times two
What are the two formulas for circumference?
C= 2 times pi and C= pi times diameter C= 2 times pi and C= pi times diameter
Why is circumference equal to 2 times Pi times r?
circumference=pi circumference=pi circumference=pi
What is pi to 13 decimal places?
pi = 3.1415926535897
