He ratio between circumference<span> and </span>diameter<span> of any circle in a Euclidean space, is the same value as the ratio of area of a circle and square of its radius. pi=2*pi*R/2*R, where 2*pi*R=</span>circumference<span> of any circle and 2*R=D=</span>diameter<span> of any circle.</span>
The reason glaciers are melting are because of man-made factors. Green house gas, emissions and aerosols are good examples of what man made factors are melting earths glaciers.
When Egypt was defeated by Israel in 1973, president Sadat decided to pursue permanent peace with Israel.