Advertisements
Advertisements
प्रश्न
What is the perimeter of the following figures? What do you infer from the answers?
 (a) |
 (c) |
 (b) |
 (d) |
Advertisements
उत्तर
- Perimeter of the square = 4 × side
= 4 × 25
= 100 cm - Perimeter of rectangle = 2 (40 + 10)
= 2 × 50
= 100 cm - Perimeter of rectangle = 2 (Length + Breadth)
= 2 (30 + 20)
= 2 (50)
= 2 × 50
= 100 cm - Perimeter of triangle = 30 + 30 + 40
= 100 cm
∴ All the figures have the same perimeter.
संबंधित प्रश्न
Each side of a rectangle is doubled. Find the ratio between :
(i) perimeters of the original rectangle and the resulting rectangle.
(ii) areas of the original rectangle and the resulting rectangle.
A farmer has a rectangular field of length and breadth 240 m and 180 m respectively. He wants to fence it with 3 rounds of rope as shown in the figure. What is the total length of rope he must use?
The sides of a triangle are 24.7cm, 20.4 cm, and 10.5 cm respectively. What is the perimeter of the triangle?
Find the perimeter of the following figure
There is a rectangular lawn 10 m long and 4 m wide in front of Meena’s house (see the figure). It is fenced along the two smaller sides and one longer side leaving a gap of 1 m for the entrance. Find the length of fencing.
The length of a rectangular field is twice its breadth. Jamal jogged around it four times and covered a distance of 6 km. What is the length of the field?
The area of a rectangular field is 1600 sq m. If the length of the field is 80 m, find the perimeter of the field.
36 unit squares are joined to form a rectangle with the least perimeter. Perimeter of the rectangle is ______.
In the following figure, perimeter of (ii) is greater than that of (i), but its area is smaller than that of (i).
 |
 |
| (i) | (ii) |
An increase in perimeter of a figure always increases the area of the figure.
