The opposite sides of a parallelogram are parallel.

Some important geometric shapes are the triangle, the square, the rectangle, the circle, the parallelogram and the trapezium.

A parallelogram is a quadrilateral formed from two sets of parallel lines.

The rectangle and the rhombus are parallelograms.

A square is one type of rectangle, and a rectangle is one type of parallelogram.

Important geometric figures, that are triangle, square, rectangle, circle, parallelogram and trapeze.