So you have a circle. What is the area of that circle? Surely everyone remembers that the area of a circle is: Where Pi (π) is of course the number and r is the radius of the circle. Where does this ...

The ability to round a number to a number of decimal places or to a number of significant figures is essential if answers are to be written to the correct degree of accuracy asked for in a question.

STEP 1 - CUT OUT CIRCLE: Use the compass to draw a circle on the paper. Cut it out, fold it in half and use the ruler to draw a line along the fold. Image caption, STEP 2 - CUT INTO SEGMENTS: Fold it ...

The radius of a circle or a sphere is the distance between the center and the edge. The radius can be used to calculate a circle's diameter, area and circumference. Likewise, a sphere's volume is ...

Pi represents the ratio of the circumference of a circle to its diameter. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Pi is a number that ...

IT is not possible to measure exactly the interminable fraction required for the line BZ in the following figure, but it is quite easy to draw it so nearly that the ...