Question 15 Marks
Draw circles of different radii on a graph paper. Find the area by counting the number of squares. Also, find the area by using the formula. Compare the two answers.
9 questions · timed · auto-graded

| Parallelogram | Base | Height | Area | Perimeter |
| (i) | 5 units | 3 units | 5 $\times$ 3 $=$ 15 sq units | |
| (ii) | ||||
| (iii) | ||||
| (iv) | ||||
| (v) | ||||
| (vi) | ||||
| (vii) |

| Parallelogram | Base | Height | Area | Perimeter |
| (i) | 5 units | 3 units | 5 $\times$ 3 $=$ 15 sq units | $2(\sqrt{10}+5)$ units |
| (ii) | 5 units | 3 units | 5 $\times$ 3 $=$ 15 sq units | $2(\sqrt{13}+5)$ units |
| (iii) | 5 units | 3 units | 5 $\times$ 3 $=$ 15 sq units | $2(3 \sqrt{2}+5)$ units |
| (iv) | 5 units | 3 units | 5 $\times$ 3 $=$ 15 sq units | $2(\sqrt{10}+5)$ units |
| (v) | 5 units | 3 units | 5 $\times$ 3 $=$ 15 sq units | $2(\sqrt{13}+5)$ units |
| (vi) | 5 units | 3 units | 5 $\times$ 3 $=$ 15 sq units | $2(3 \sqrt{2}+5)$ units |
| (vii) | 5 units | 3 units | 5 $\times$ 3 $=$ 15 sq units | 20 units |

| S.No. | Base | Height | Area of the triangle |
| (i) | 15 cm | ... | $87 cm^2$ |
| (ii) | ... | 31.4 mm | $1256 cm^2$ |
| (iii) | 22 cm | ... | $170.5 cm^2$ |
| S.No. | Base | Height | Area of the triangle |
| (i) | 15 cm | 11.6 cm | $87 cm^2$ |
| (ii) | 80 mm | 31.4 mm | $1256 cm^2$ |
| (iii) | 22 cm | 15.5 cm | $170.5 cm^2$ |
| S.No. | Base | Height | Area of the parallelogram |
| (i) | 20 cm | $246 cm^2$ | |
| (ii) | 15 cm | $154.5 cm^2$ | |
| (iii) | 8.4 cm | $48.72 cm^2$ | |
| (iv) | 15.6 cm | $16.38 cm^2$ |
| S.No. | Base | Height | Area of the parallelogram |
| (i) | 20 cm | 12.3 cm | $246 cm^2$ |
| (ii) | 10.3 cm | 15 cm | $154.5 cm^2$ |
| (iii) | 5.8 cm | 8.4 cm | $48.72 cm^2$ |
| (iv) | 15.6 cm | 1.05 cm | $16.38 cm^2$ |


