README
Usage:
var x = require('./index.js');
console.log('rectangle: ',x.rectangle(10,20)); console.log('are of square: ',x.square(10));
console.log('are of triangle: ',x.triangle(10,20));
console.log('are of circle: ',x.circle(10)); console.log('are of Parallelogram: ',x.Parallelogram(10,20)); console.log('are of Trapezium: ',x.Trapezium(10,20, 1));
console.log('are of Trapezium: ',x.Ellipse(10,20));