Study guides

☆☆

Q: 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?

Write your answer...

Submit

Related questions

In a circle, the area of the circle is pi times the radius squared

It depends on the ratio of what of the circle? Its circumference, diameter, area?

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.

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

1/3.15159

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.

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.

The area of a circle if the radius is 9m 254.5m2

The area of a circle with a radius of 14.4 is 651.4

The area of a circle of radius 21 is 1386

The radius of a circle with the area of 36 is 3.385

Area of a circle = pi*radius squared

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.

The area of a circle if the radius is 7yd is 153.9yd2

A circle with a radius of 10m has an area of 314.16 m2

The area of a circle with a radius of 2m is: 12.566 m2

If the area of a circle is 40.7 the radius is: about 3.6 (3.599)

The radius of a circle when the area is 96 is 5.528

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

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)

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)

The area of a circle is 153.86cm².find the radius of the circle

A circle with a radius of 14 feet has an area of 615.75 square feet.

Area of a circle = pi times radius squaredDiameter of a circle = 2 times radius

The circle's area is 70,900,000 square units.