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What is the area of a circle with a radius of 25 cm?
A circle with a radius of 25 cm has an area of 1,963.5 square cm.
What is 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?
Area circle = π × radius² Area smaller circle = π × (4 cm)² = 16π cm² Area larger circle = π × (10cm)² = 100π cm² → probability inside smaller circle = area_smaller_circle/area_larger_circle = 16π cm²/100π cm² = 16/100 = (4×4)/(4×25) = 4/25.
How many diameters is 10.5 cm?
a diameter is not a unit of measurement; it is the distance across a circle.
The area of a circle is the same as the area of a square whose side is 5 centimeters The radius of the circle is closest to?
The area of the square = 52 = 25 sq cm The formula for the area (A) of a circle is A = π r2 Therefore for the areas to be equal then π r2 = 25 : r2 = 25/π = 7.9577 (4dp) Then r = √7.9577 = 2.82 cm The nearest integer measurement of the radius is 3 cm.
What is the area of a circle ewith a diameter of 10cm?
Using 3.14 as Pi the area of circle is: 78.5
