## Quadrilateral

A quadrilateral is plane figure bounded by four straight lines. The straight line joining the opposite corners is called its... Click here to read more

From basic to higher mathematics

A quadrilateral is plane figure bounded by four straight lines. The straight line joining the opposite corners is called its... Click here to read more

A square is a quadrilateral whose four angles are all right angles and whose all sides are equal. Let be... Click here to read more

A rectangle is a quadrilateral in which all four angles are right angles and the opposite sides are equal in... Click here to read more

A parallelogram is a quadrilateral whose opposite sides are of equal length and parallel. The diagonals of a parallelogram are... Click here to read more

A rhombus is a quadrilateral having all sides with unequal diagonals which bisect each other. Note: If a square is... Click here to read more

A trapezoid is a quadrilateral with two sides parallel and the other two unparallel. The parallel sides of a trapezoid... Click here to read more

A quadrilateral inscribed is a circle is known as a cyclic quadrilateral. The proof is beyond the scope of this... Click here to read more

A plane figure bounded by four straight line segments is called an irregular quadrilateral. The area of any irregular quadrilateral... Click here to read more