Page 181 - Start Up Mathematics_4

2. Find the perimeter of the following shapes. Use thread and ruler.

(a) (b) (c)

3. Find the length of the missing side, given the perimeter of the figure.

16 cm ?
(a) (b) (c) 15 cm
40 cm 50 cm ?
13 cm ?
12 cm
80 cm
14 cm
Perimeter = 60 cm Perimeter = 230 cm Perimeter = 35 cm

16 cm 9 cm
(d) 6 cm 3 cm (e) (f)
4 cm
3 cm 20 cm ? 8 cm
4 cm ?
? 9 cm
2 cm
16 cm
Perimeter = 22 cm Perimeter = 72 cm Perimeter = 34 cm

(Hint: To find the missing side of a figure, given its perimeter and the other sides,
we subtract the sum of the given sides from the perimeter).

4. Find the perimeter of a square whose side is given below.
(a) 16 cm (b) 12 cm (c) 25 cm (d) 43 cm (e) 92 cm

5. Find the perimeter of a rectangle whose sides are given below.

(a) 22 cm and 18 cm (b) 32 cm and 14 cm (c) 25 m and 84 m
6. Find the perimeter of the following figures if each side of the square in the grid is of
length 1 cm.

(a) (b)

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