Question

1B
DEROSE
1. Find the area of a square of side
(1) 8 cm.
(ii) 6.5 cm.
(ili 7 m.
(iv) 9
(iv) 9 cm
cm.
2. Find the area of a rectangle of
(1) length = 15 cm and breadth
(ui) length = 2.5 m and breadth
3. Find the side of a square of area
= 10 cm. (11) length
1.75 m. (iv) length = 16
= 18 cm and breadth 12 cm.
1
m and breadth = 6 = m.
4
5
(i) 169 cm n.
(ii) 729 cm
(iii) 441 m2
4. Find the perimeter of a square of area
(1) 289 cm?
(iii) 49 m2
5. (a) The area of a rectangle is 168 cm?
(ii) 256 cm2
and perimeter.
(b) The area of a rectangle is 180 cm2 and its length is 15 cm. Find its breadth
and perimeter.
(a) The perimeter of a square is equal to that of a rectangle of length 15 cm and breadth
13 cm. Find its area.
(b) The length of a rectangle is 10 cm and its perimeter is equal to that of a square of
side 9 cm. Find the area of the rectangle.
7. Find the area enclosed by each of the following figures, in which each pair of consecutive
sides are at right angles.
6.
3 cm
3 cm
4 cm
cm w​

Answer 1

Answer:

1. i) a²=8²=64cm²

ii) a²=6.5²=42.25cm²

iii) a²=7²=49m²

iv) a²=9²=81cm²