Quadrilateral

Posted in Terms Defined

Quadrilateral is a type of polygon with four sides.

Sum of all interior angles: Sum of all interior angles of a quadrilateral is 360°.

Types of quadrilaterals and their properties:

Quadrilateral Properties

Parallelogram

A quadrilateral with each pair of opposite sides equal.

(1) Opposite sides are equal.

(2) Opposite angels are equal.

(3) Diagonals bisect one another.

Rhombus

A parallelogram with sides of equal length.

(1) All the properties of a parallelogram.

(2) Diagonals are perpendicular to each other.

Rectangle

A parallelogram with a right angle.

(1) All the properties of a parallelogram.

(2) Each of the angles is a right angle.

(3) Diagonals are equal.

Square

A rectangle with sides of equal length.

All the properties of a parallelogram, rhombus and a rectangle.

Kite

A quadrilateral with exactly two pairs of equal consecutive sides.

(1) The diagonals are perpendicular to one another.

(2) One of the diagonals bisects the other.

(3) In the figure m∠B = m∠D but m∠A≠m∠C.