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How do you multiply two times pi times two?
2 x pi x 2 = 4 x pi
What is the circumference of a circle with a diameter of four feet?
Circumference equals pi (which is about 3.14) times diameter (or pi times 2 times the radius, which is the same thing). Pi times 4' = 12' 6.8"
What is the circumference of a 4 in diameter?
Circumference of circle: 4 times pi in inches
What is the area of circles with a radius of 4 inches and with a diameter of 4 inches and with a circumference of 4 inches?
The area (A) of a circle is pi (about 3.14) times the square of the radius (r). The circumference (c) of a circle is pi times its diameter (d), or pi times twice its radius. Knowing that, we can investigate the three circles. If rcircle = 4, Areacircle = pi r2 = 3.14 x 42 = 3.14 x 16 = 50.27 sq. in. If dcircle = 4, Areacircle = pi (d/2)2 = 3.14 x (4/2)2 = 3.14 x (2)2 = 3.14 x 22 = 3.14 x 4 = 12.57 sq. in. If c - 4, Areacircle = pi (c/2 pi)2 = pi (42/4 pi2) = pi x 16/ 4 x pi2 = 16/ 4 x pi = 4/3.14 = 1.27 sq. in.
What is the volume of this shere that has a radius of 6 inches?
Volume of sphere: 4/3 times pi times 6 cubed = 288*pi cubic inches
