Question

8. Find the perimeter of a rectangle whose sides are :
1.
5 cm and 3 cm
7 cm and 9 cm
2. 3 cm and 6 cm
5. 4 cm and 9 mm
3. 8 cm and 7 cm
6. 15 cm and 9 cm
c. Find the perimeter of the square whose side is
2. 11 cm
3. 7 cm
4. 25 cm
5. 55 mm
1. 5 cm
169
please answer​

Answer 1

Step-by-step explanation:

Perimeter of the rectangle = PQ + QR + RS + SP

= b +l + b + l

= 2b +2l

Again,

ABCD is a rectangle. We know that the opposite sides of a rectangle are equal.

Perimeter of a Rectangle

AB = CD = 5 cm and BC = AD = 3 cm

So, the perimeter of the rectangle ABCD = AB + BC + CD + AD = 5 cm + 3 cm + 5 cm + 3 cm = 16 cm

It can be written as 5 cm + 5 cm + 3 cm + 3 cm

= (2 × 5) cm + (2 × 3) cm

= 2 (5 + 3) cm

= 2 × 8 cm

= 16 cm

We add length and breadth twice to find the perimeter of a rectangle.

Perimeter of a rectangle = 2 (length + breadth)

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Answer 2

Answer:

16cm

Step-by-step explanation:

explaination