ppt on quadrilaterals

PPT made from NCERT

1. Presentation On QUADRILATERALS MATHS PROJECT Made by :- Nikhil SETHIA ix- a

2. What is Quadrilateral? A figure formed by joining four points in a order is called a Quadrilateral. It has four sides, four angles and four vertices .

3. Do we see quadrilateral in our day to day life? Yes, we see quadrilaterals in our day to day life . Examples :- the floor, walls, ceiling, window, paper of our book etc.

4. Parallelograms Parallelogram is a figure having four sides, four angles and four vertices. It has opposite equal and parallel .

5. Different types of quadrilaterals When one pair of opposite side of a quadrilateral are parallel then it is a trapezium When both pairs of opposite sides of a quadrilateral are parallel then it is a parallelogram. When opposite sides of a parallelogram are equal then it called a rhombus.

6. Properties of parallelograms A diagonal of a parallelogram divides it into two congruent triangles. In a parallelogram opposite sides are equal. In a parallelogram opposite angles are equal. The diagonals of a parallelogram bisect each other.

7. Mid point theorem Mid point theorem is used basically in triangles. It is basically to prove the 2 nd side of the triangle to the 3 rd side.

8. Summary Sum of the angles of a quadrilateral is 360. In a parallelogram opposite side, opposite angle are equal and diagonals bisect each other. Diagonals of a rectangle bisect each other and are equal and vice versa. The line segment joining the mid point of any two side of a triangle is parallel to the third side is half of it.

9. Lets do some questions Q1. The angles of quadrilateral are in the ratio 3:5:9:13. Find all the angles of quadrilateral. Q2. Show that the diagonals of a square are equal and bisect each other at right angles. Q3. The line segment joining the mid point of two sides of a triangle is parallel to the third side. (Proof The Above)

10. THANK YOU SUBMITTED TO : Ms. Bobita SUBMITTED BY : NIKHIL SETHIA IX