Question

B
Find the perimeter of a square whose side is 5cm?
Find the perimeter of rectangle whose length is 4cm and breadth is 2cn?
Find the perimeter of triangle whose side is 6cm?​

Answer 1

Step-by-step explanation:

"Perimeter of square is 4×S

=4×5

= 20cm

Perimeter of rectangle is 2(L×B)

=2(4+2)

=2(8)

=16cm"

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Answer 2

Answer :-

• Perimeter of square = 20cm.
• Perimeter of rectangle = 12cm.
• Perimeter of triangle = 18cm.

Step-by-step explanation:

Question 1

Find the perimeter of a square whose side is 5cm?

Solution

Given that,

• Side of square = 5cm.

We know,

Perimeter of square = 4 × side,

Therefore,

⇒ 4 × side

⇒ 4 × 5

⇒ 20cm

Hence, The perimeter of square is 20cm.

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Question 2

Find the perimeter of rectangle whose length is 4cm and breadth is 2cm?

Solution

Given that,

• Length of rectangle = 4cm
• Breadth of Rectangle = 2cm

We know,

Perimeter of rectangle = 2(length + breadth),

Therefore,

⇒ 2(length + breadth)

⇒ 2(4 + 2)

⇒ 2(6)

⇒ 12cm

Hence, The perimeter of rectangle is 12cm.

________________________________

Question 3

Find the perimeter of triangle whose side is 6cm?

Solution

Given that,

• Side of triangle = 6cm

We know,

Perimeter of triangle = 3 × side,

Therefore,

⇒ 3 × side

⇒ 3 × 6

⇒ 18cm

Hence, The perimeter of triangle is 18cm.

________________________________

Formula used :-

• Perimeter of square = 4 × side
• Perimeter of rectangle = 2(length + breadth)
• Perimeter of triangle = 3 × side.