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What do they use pi in?
To calculate properties of circles
Pi number can ONLY be used for which shape?
Usually a circle but its properties can also be applied to spheres
What are the special properties of circles?
They have a circumference which is 2*pi*radius or diameter*pi They have an area which is pi*radius2 They have sectors They have chords They have segments They have a total of 360 degrees around their circumferences They have arcs which is part of their circumferences They can have a tangent which is a straight line that touches it at one point
If a ball was composed of 129600 faces how then would pi apply?
A ball with that many faces would be close to a sphere, so its volume ans surface area, and other properties could be approximated using pi.
What are properties of angles?
They are measures of angular displacement. In two dimensional space they may be measured in degrees (by beginners) or in radians. There are 2*pi radians in a revolution. In 3-d space angles are measured in steradians. A sphere measures 4*pi steradians
