Question 12 Marks
The length of the side of each square is given below. Find its area. : 18 cm
Answer
View full question & answer→Area of a square
= side x side
= 18 x 18
= 324 sq.cm.
= side x side
= 18 x 18
= 324 sq.cm.
Questions
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Question 22 Marks
The length of the side of each square is given below. Find its area. : 25 metres
Answer
View full question & answer→Area of a square
= side x side
= 25 x 25
= 625 sq.m.
= side x side
= 25 x 25
= 625 sq.m.
Question 32 Marks
The length of the side of each square is given below. Find its area. : 6 cm
Answer
View full question & answer→Area of a square
= side x side
= 6 x 6
= 36 sq.cm.
= side x side
= 6 x 6
= 36 sq.cm.
Question 42 Marks
The length of the side of each square is given below. Find its area. : 12 metres
Answer
View full question & answer→Area of a square
= side x side
= 12 x 12
= side x side
= 12 x 12
Question 52 Marks
Look at the figures on the sheet of graph paper. Measure their sides with the help of the lines on the graph paper. Write the perimeter of each in the right box.
(1) Perimeter of
rectangle ABCD
= [ ] cm
(2) Perimeter of
rectangle EFGH
= [ ] cm
(3) Perimeter of
square PQRS
= [ ] cm
(4) Perimeter of
rectangle STUV
= [ ] cm
Answer
View full question & answer→(1) Perimeter of a rectangle ABCD
= 2 x length + 2 x breadth
= 2 x 3.5 + 2 x 2.5
= 7 + 5
= 12 cm
∴ 12 cm
(2) Perimeter of a rectangle EFGH
= 2 x length + 2 x breadth
= 2 x 3.8 + 2 x 1.3
= 7.6 + 2.6
= 10.2 cm
∴ 10.2 cm
(3) Perimeter of a rectangle PQRS
= 2 x length + 2 x breadth
= 2 x 2.4 + 2 x 2.4
= 4.8+ 4.8
= 9.6 cm
∴ 9.6 cm
(4) Perimeter of a rectangle STUV
= 2 x length + 2 x breadth
= 2 x 3 + 2 x 2
= 6 + 4
= 10 cm
∴ 10 cm
(5) Perimeter of a triangle LMN
= 1.5 + 2.5 + 2
= 6 cm
∴ 6 cm
Question 62 Marks
Each side of a square is 9 m long. Find its perimeter.
Answer
View full question & answer→Perimeter of a square
= 4 x length of one side
= 4 x 9
= 36 m
∴ Perimeter is 36 m
= 4 x length of one side
= 4 x 9
= 36 m
∴ Perimeter is 36 m
Question 72 Marks
If the length of a rectangle is 20 m and its width is 12m, what is its perimeter?
Answer
View full question & answer→Perimeter of a rectangle
= 2 x length + 2 x breadth
= 2×20 + 2×12
= 40 + 24
= 64 m
∴ Perimeter is 64 m
= 2 x length + 2 x breadth
= 2×20 + 2×12
= 40 + 24
= 64 m
∴ Perimeter is 64 m
Question 82 Marks
How much wire will be needed to make a rectangle 7 cm long and 4 cm wide?
Answer
View full question & answer→Perimeter of a rectangle
= 2 x length + 2 x breadth
= 2 x 7 + 2 x 4
= 14 + 8
= 22 cm
= 2 x length + 2 x breadth
= 2 x 7 + 2 x 4
= 14 + 8
= 22 cm
∴ 22 cm wire will be needed to make a rectangle
Question 92 Marks
Answer
View full question & answer→Perimeter of the figure
= 10 + 6 + 6 + 10 + 8 + 8
= 48 cm
= 10 + 6 + 6 + 10 + 8 + 8
= 48 cm
∴ 48 cm
Question 102 Marks
Answer
View full question & answer→Perimeter of the figure
= 12 + 18 + 8 + 8 + 18
= 64m
= 12 + 18 + 8 + 8 + 18
= 64m
∴ 64m
Question 112 Marks
Write the perimeter of each figure in the box given below it.
Answer
View full question & answer→Perimeter [ ] DABCD
= 20 + 16 + 7 + 14
= 57 cm
= 20 + 16 + 7 + 14
= 57 cm
∴ 57 cm