The base and perpendicular height are at right angles. Showing that a parallelogram has the same area as a rectangle: Split the parallelogram into a right-angled triangle and a trapezium. Move the ...

This e-example contains the original applet which conforms more closely to the pointers in the book. To move a shape, click inside of a shape and drag it. To rotate the shape, click on a vertex of the ...

A parallelogram is a four-sided polygon with two pairs of opposite, parallel sides. They can be found in a variety of shapes and sizes and are widely used in mathematics and geometry. One essential ...