Calculate the circumference of a circle. Examples; Question; ... Using π = 3۰142, find the circumference a circle with a radius of 3۰25 cm. Give the answer to 3 significant figures.

Here's how this will work. You draw a circle. From that circle, you can determine both the circumference and the radius. Then the value of pi would be the circumference divided by twice the radius.

The radius can be used to calculate a circle's diameter, area and circumference. Likewise, a sphere's volume is calculated from the radius. If you already know any of these figures, you can easily ...

Every year, the celebration of Pi Day (March 14 is 3.14) grows more ambitious. Math teachers love to dream up unique classroom activities to celebrate Pi for it endless opportunity to calculate (3 ...

The vertical side of this rectangle is the radius of the circle and the length of the side is half of the circumference (so, 2πR). Yes, the area of this rectangle would be π R 2 . That's the ...

Imagine the square’s sides are of length 2, so its area is 4; the circle’s diameter is therefore 2, and its area is pi. The ratio between their areas is pi/4, or about 0.7854.

Using π = 3۰142, find the circumference a circle with a radius of 3۰25 cm. Give the answer to 3 significant figures. Image caption, The formula for the circumference, ...