Q: What is the cicumference of a circle with a radius of 4 cm?

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Its radius is: 4/2 = 2 cm

The probability as a fraction that a point chosen at random within a circle of radius 10 cm will be inside a concentric circle of radius 4 cm is the ratio of the area of the smaller circle (4 cm radius) to the area of the larger circle (10 cm radius). Therefore, the probability is (4^2)/(10^2) = 16/100 = 4/25.

A circle with a radius of 4 cm has an area of 50.27 square cm.

2 cm

2 cm

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4 cm radius = Area of 50.26548 sq. cm.

Its radius is: 4/2 = 2 cm

The probability as a fraction that a point chosen at random within a circle of radius 10 cm will be inside a concentric circle of radius 4 cm is the ratio of the area of the smaller circle (4 cm radius) to the area of the larger circle (10 cm radius). Therefore, the probability is (4^2)/(10^2) = 16/100 = 4/25.

A circle with a radius of 4 cm has an area of 50.27 square cm.

A circle with a radius of 4 cm has an area of 50.27 square cm.

A circle with a radius of 4 cm has an area of 50.27 square cm.

2 cm

2 cm

Area of a circle = pi x (radius)2So, if the radius is 4 cm, the area is pi x 42= 50.265 cm2

A=Pi(r)2 - A circle with a radius of 4 cm has an area of 50.27 square cm

Radius = 1/2 of diameter = 4 cm

A circle that is 25.13272 cm in circumference.