A quadrilateral is a plane figure formed by joining four non-collinear points in an order. The sum of interior angles of any quadrilateral is always 360 degrees. There are six main types of quadrilaterals: 1) trapezium - one pair of opposite sides is parallel, 2) parallelogram - opposite sides are parallel and equal, opposite angles are equal, 3) rectangle - all angles are 90 degrees, 4) square - all sides are equal length and all angles are 90 degrees, 5) rhombus - all sides are equal length but angles may vary, 6) kite - two pairs of adjacent sides are equal length.

1. QUADRILATERAL

3. WHAT IS A QUADRILATRAL
A PLANE FIGURE FORMED BY JOINING FOUR
NON COLLINEAR POINTS IN AN ORDER IS
CALLED A QUADRILATRAL.

4. Vertices : A,B,C and D
Diagonals : AC and BD
Opposite sides : AB and DC ,AD and BC
Adjacent sides : AB and BC,BC and CD, CD and DA, DA and AB
Opposite Angles : A and C , B and D
Consecutive Angles : A and B, B and C, C and D, D and A

5. ANGLE SUM PROPERTY OF QUADRILATRAL
USING SUM ANGLE PROPERTY IN ΔABC AND
ΔADC AND ON ADDING THEM WE GET SUM
360°. SO, WE CAN SAY THAT SUM OF
INTERIOR ANGLES OF A QUADRILATERAL IS
360°

7. PARALLELOGRAM
*OPPOSITE SIDES ARE EQUAL
*OPPOISTE ANGLES ARE EQUAL
* DIAGONALS BISECT EACH OTHER

9. SQUARE
*OPPOSITE SIDES ARE PARALLEL
*ALL SIDES ARE EQUAL
*EACH ANGLE IS OF 90°
*DIAGONALS ARE EQUAL AND
PERPENDICULAR BISECT EACH OTHER

11. TRAPEZIUM
A QUADRILATERAL IN WHICH ONE
PAIR OF OPPOSITE SIDE IS PARALLEL

12. A QUADRILATERAL IN WHICH BOTH
PAIRS OF CONSECUTIVE SIDES ARE
EQUAL
KITE

14. SUMMARY
*A QUADRILATERAL IS A FOUR SIDED POLYGON.
*THE SUM OF ANGLES OF A QUADRILATERAL IS
360°
*THERE ARE MAINLY 6 TYPES OF QUADRILATERAL
. 1. TRAPEZIUM
2. PARALLELOGRAM
3. RECTANGLE
4. SQUARE
5. RHOMBUS
6. KITE

15. END OF THE PRESENTATION