QUADRILATERAL

Presented by:

Aruna devi .S

Soumya. M. S

Lekshmi. S

Std: X A

Contents:Contents:

1.Diagonals of quadrilateral

2.Adjacent Sides and Opposite Sides

3.Adjacent Angles and Opposite Angles.

4. The Interior and Exterior of a Quadrilateral.

1.Diagonals of quadrilateral1.Diagonals of quadrilateral

The two line segments AC and BD joining opposite vertices are called diagonals of the quadrilateral ABCD

AC and BC are two diagonals.

2.Adjacent Sides and Opposite Sides2.Adjacent Sides and Opposite Sides

Two sides that have a common vertex are known as adjacent sides.

eg. EH and EF Any two sides that do not

have a vertex in common are known as opposite sides.

eg. EH and FG

3.Adjacent Angles and3.Adjacent Angles and Opposite Angles. Opposite Angles.

Two angles of a quadrilateral are said to be adjacent angles, if they have a side of the quadrilateral as a common arm.

<A, <B are adjacent because the side A B is a common arm of <A and <B.

Two angles of the quadrilateral that are not adjacent are called opposite angles.

<A and <C are opposite angles.

The Interior of a Quadrilateral

This part is called the interior of the quadrilateral.

4.The Exterior of a Quadrilateral.4.The Exterior of a Quadrilateral.

The blue shaded portion is called the exterior of the quadrilateral.

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