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How many inches is the circumference of a circle if its radius is 21 inches?
Wiki User
∙ 13y ago
C = 131.95 inches.
Wiki User
∙ 13y ago
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How many times does the radius of a circle fit along the circumference of the circle?
It is: circumference/radius = 2*pi
How many inches is the circumference of an 8 inch circle?
The circumference of an 8 inch circle is: 25.13 inches(diameter x Pi = circumference).
How do you find the circumference with radius of 18 in if you leave your answer n pie terms how many inches is it?
Circumference = 2*pi*radius or pi*diameter Circumference = 36pi inches
How many sq inches in a 6 circle?
Area of a circle: pi*radius*radius
How many feet are in a 28 foot Circle?
Circumference of a circle: 2*pi*radius or diameter*pi Area of a circle: pi*radius squared
How many square inches in a 10 circle?
you have to quote the diameter or radius or circumference of the circle to calculate the area. If diameter 78.53. If radius 314.15. If circumference 7.95
Is About how many inches is the circumference of a circle if its radius is 21 inches?
The circumference is about 131.9 inches. (C = r x 2 x Pi)
How many square inches in a 10 inch circle?
you have to quote the diameter or radius or circumference of the circle to calculate the area. If diameter 78.53. If radius 314.15. If circumference 7.95
How many times does the radius of a circle fit along the circumference of the circle?
It is: circumference/radius = 2*pi
How many square inches in a 18 inch circle?
All depends what you mean by 18 inches, is that the circumference, the diameter or the radius
How many inches is the circumference of an 8 inch circle?
The circumference of an 8 inch circle is: 25.13 inches(diameter x Pi = circumference).
How do you find the circumference with radius of 18 in if you leave your answer n pie terms how many inches is it?
Circumference = 2*pi*radius or pi*diameter Circumference = 36pi inches
How many sq inches in a 6 circle?
Area of a circle: pi*radius*radius
How many lineal inches in a 12 inches circle?
The circumference of a circle, with a diameter of 12 inches, is 37.7 inches.
Can there be more than 4 radius in a circle?
Yes, providing that they stem from the center of the circle to its circumference.
How many feet are in a 28 foot Circle?
Circumference of a circle: 2*pi*radius or diameter*pi Area of a circle: pi*radius squared
How many square inches in a 4.25 inch circle?
A circle that is 4.25 inches implies that its circumference is 4.25 inches; that is, it is 4.25 inches around. The formula for the circumference of a circle is given as c = 2πr, where c is the circumference, pi is a constant (approximately 3.14), and r is the radius of the circle. Since the c-value is known we can use algebra to manipulate the formula in order to solve for r (the only missing piece of information). Doing so yields r = c/2π. Substituting the circumference of 4.25 inches into the formula reveals that the radius must be .68 inches (rounded to two decimal places). Now that the radius of the circle is known, the surface area can be calculated with the formula A = πr2. Substituting the determined value of the radius in for r produces a surface area of 1.45 inches2. The unit of square inches comes from the fact that we are not only multiplying the numerical value of the radius, but also its units. In this case, r2 = (0.68 inches)(0.68 inches) = 1.45 inches2.
