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Circle A has radius 4 feet circle B has radius 9 feet What is the ratio of the area of circle A to the area of circle B?
Wiki User
∙ 12y ago
Area(A)/ Area(B) = pi*rA2/pi*rB2 = rA2/rB2 = 16/81
Wiki User
∙ 12y ago
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If the radius of a circle with an area of 120 mm squared is multiplied by 3 what is the area of the new circle?
In ratios, the ratios of areas is the square of the ratio of sides. Consider the original circle and the new larger circle formed by multiplying its radius (length) by 3: The circles have lengths in the ratio 1 : 3 → the circle have areas in the ratio 1² : 3² = 1 : 9 → The larger circle's area is 9 × 120 mm² = 1080 mm²
What is the radius of a circle when the area is 96?
The radius of a circle when the area is 96 is 5.528
If the radius of a circle is doubled what happens to the area of the circle?
the area of the circle is increased by 400%
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How do you find the radius of circle with area 144pi?
Equation for the area circle = pi x radius squared If the area is 144pi, then you need to find the square root of 144, which is 12. Therefore, radius = 12
How do you find ratio of area to radius?
In a circle, the area of the circle is pi times the radius squared
What is the ratio of a circle with a radius of 8cm?
It depends on the ratio of what of the circle? Its circumference, diameter, area?
How do you find the area of a circle when the radius is unknown?
By using the other information supplied about the circle to calculate either its radius (from which its area can be calculated) or its area (if the circle is similar to another with a given area and some ratio between the two circle is given):If the diameter is given: radius = diameter ÷ 2If the circumference is given: radius = circumference ÷ 2πIf the circle is similar to another circle which has a given area, and the length ratio is given; square the length ratio to get the area ratio and apply to the given area.
What is the ratio of the area of a circle to the area of a square when one side of the square is the radius of the circle?
Let's call the number 'K' ... the side of the square and the radius of the circle.-- the area of the square is [ K2 ]-- the area of the circle is [ (pi) K2 ]-- The ratio of the circle to the square is [(pi) K2 / K2 ] = pi
What is the ratio if the area of a circle to the area of a square when one side of the square is the radius of the circle?
1/3.15159
What is the ratio of a circle's circumference called?
The ratio of a circle's circumference to its area is called the reciprocal of half the radius. The ratio of the circumference to its radius is called two times pi.
How do you find ratio of a circumference?
The answer depends on what the ratio is relative to!The ratio of a circumference to the area of a circle is half the radius.
If the radius of a circle with an area of 120 mm squared is multiplied by 3 what is the area of the new circle?
In ratios, the ratios of areas is the square of the ratio of sides. Consider the original circle and the new larger circle formed by multiplying its radius (length) by 3: The circles have lengths in the ratio 1 : 3 → the circle have areas in the ratio 1² : 3² = 1 : 9 → The larger circle's area is 9 × 120 mm² = 1080 mm²
How do you get the area of a cylinder base in fifth grade math.?
The base of a cylinder is a circle. So we can use the area formula for a circle. Area = πr2 where r is the radius of the circle, and pi is the ratio of the circumference of the circle to its diameter.
If the radius of a circle is 18 inches what is the area?
The area of a circle is given by the formula A = πr2 where pi is the ratio of the circumference of a circle to its diameter and r is the radius. π = 3.1416 approx. A = π182 = 324π = 1017.88 in2 (2dp)
What is the ratio between radius and area for a circle?
There is no direct ratio. The area is related to the square of the radius by the factor "pi." A = (pi) r2 (Pi is about 3.1416)
What is the area of a circle if the radius is 9m?
The area of a circle if the radius is 9m 254.5m2
