this is a very informative ppt on rectangles . their properties , area, perimeter ,sum of all the angles, diagnols etc.

1. Rectangles

2. Introduction
 What is a Rectangle ??
 A Rectangle is a parallelogram in which each
angle is a right angle.

3. Properties
 Opposite sides are parallel and equal
 Each angle is a right angle
 Diagonals are equal
 Diagonals bisect each other

4. Sum of the angles of the
Rectangle
 ABCD is a rectangle. Hence,
 AB II CD , AD II BC , A = C , B = D
 If A is 90◦, then C is also the same.
 B = D ( 90◦)
 A + C = 180◦ ; 90◦ + 90◦ = 180◦
 Sum of all angles is :
 90◦ + 90◦ + 90◦ + 90◦ = 360◦ ; A + B + C + D = 360◦

5. Diagonals of a Rectangle
 A rectangle has two diagonals, they are equal in length
and intersect in the middle.
 The Diagonal is the square root of (width squared +
height squared):
 Diagonal "d" = √(w2 + h2)
 Example:
 Q: A rectangle has a width of 12 cm, and a height of 5
cm, what is the length of a diagonal?
 A: Diagonal Length = √(52 + 122) = √(25 + 144) = √169 = 13
cm

6. Area
 Area of a rectangle = Length X Breadth
 Example :
 Q : A rectangle is 6 cm in Length and 3 cm in Breadth.
What is the n Area ?
 A : Formula = L X B
6 X 3
= 18 cm
1
2
74
5 8
63 9 12 15 18
10 13
1411 17
16

7. Perimeter
 Perimeter of a rectangle = 2 X ( Length + Breadth )
 Example :
 Q : A rectangle has a Length of 6 cm and Breadth of 2 cm.
Find the sdf Perimeter
 A : Formula = 2 X ( L + B )
2 X ( 6 + 2 )
2 X 8
= 16 cm

8. Conclusion
 Diagonal "d" = √(w2 + h2)
 Area of a rectangle = Length X Breadth
 Perimeter of a rectangle = 2 X ( Length + Breadth )
 Sum of all angles in a rectangle = 360
◦

9. n

10. THANK YOU
 Done By :
 Imran (Leader)
 Luqman (PPT)
 Lenoah
 Mobi
 Kabeer
 Hasnain
 Asad