Question

Exercise 2
1. Find the perimeter of the following:
A rectangle having length = 6 cm and breadth = 4,5 cm
b) A rectangle having length = 12 cm and breadth = 10.6 cm
A rectangle having length = 15 cm and breadth = 8.7 cm
A square having side = 8 cm
A square having side = 10.5 cm
A square having side = 16.25 cm
square having side = 6.8 cm
A
A triangle having sides = 11.2 cm, 8.8 cm and 5.6 cm
2. Find the length of a fence needed to build a boundary of a re
having length 96.5 m and breadth 47.5 m.
3 Find the length of a ribbon required to cover a square having
4. The perimeter of a table top is 5 m. If the length of a table is
hrradth of​

Answer 1

Answer:

b) Given, l=12 cm

b=8 cm

We know that

Perimeter of rectangle =2(l+b)

=2×(12+8)

=40cm

Hence,

perimeter of the triangle is 40cm.

Answer 2

Answer:

1. The perimeter of the rectangle is

2x(Length+breadth)

perimeter=2(6+4.5)cm

21 cm (ans)

2. The perimeter of rectangle is

2(L+B)

2(12+10.6)cm

45.2cm (ans)

3. The perimeter of rectangle is

2(L+B)

2(15+8.7)cm

47.4cm (ans)

4. Perimeter of square is

4x(side)

4x8 cm

32cm (ans)

5. Perimeter of square is

4x(side)

4x 10.5 cm

42cm (ans)

6. Perimeter of squre is

4x(side)

4x16.25 cm

65cm (ans)

7. perimeter of a squre is

4x(side)

4x6.8

27.2cm (ans)

8. perimeter of a triangle is

11.2+8.8+5.6cm

25.6cm (ans)