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**Chapter 11 Worksheet 4 | Perimeter and Area | Class-7 DAV Secondary Mathematics**

## Unit 11 Worksheet 4 || **Perimeter and Area**

**1. The area of a triangle Is 90 cm2. If Its base is 15 cm, find its altitude. **

**Answer 1:**

**2. Find the base of a triangle whose area is 0.48 dm2 and altitude is 8 cm. **

**Answer 2:**

**3. Find the area of a right triangle whose hypotenuse is 13 cm and one side is 5 cm. **

**Answer 3:**

**4. Find the area of an isosceles right triangle whose equal sides are 15 cm each. **

**Answer 4:**

**5. Find the area of an isosceles right triangle having the length of each equal side 5 cm. **

**Answer 5:**

**6. The base of a triangular field is three times its height. If the cost of cultivating the field at Rs. 36 per hectare is Rs. 486. find its base and height (1 hectare = 10000 m2). **

**Answer 6:**

**7. In the figure 11.14, ST = 5 cm, OR = 9 cm. The area of the larger triangle is 50 cm2. What is the area of shaded region?**

**Answer 7:**

**8. The area of a rhombus is 98 m2. If one of its diagonal is 14 m, find the other diagonal.**

**Answer 8:**

**9. The diagonals of a rhombus are 8 cm and 6 cm respectively. Find its area. **

**Answer 9:**

**10. Find the area of a rhombus whose side is 13 cm and altitude is 2 cm.**

**Answer 10:**

**11. The area of a rhombus is 220.5 cm2. If Its altitude Is 17.5 cm, find the length of each side of rhombus.**

**Answer 11:**

**12. A diagonal of a quadrilateral is 40 m long and the perpendiculars to it from the opposite corners are 8 m and 10 m respectively. Find Its area. (Fig. 11.15)**

**Answer 12:**

**13. Find the area of a rhombus whose diagonals are 15.2 cm and 24 cm respectively. (Fig. 11.16).**

**Answer** **13: **

- Chapter 1 Rational Numbers | Class-7 DAV Secondary Mathematics
- Chapter 2 Operations on Rational Numbers | Class-7 DAV Secondary Mathematics
- Chapter 3 Rational Numbers as Decimals | Class-7 DAV Secondary Mathematics
- Chapter 4 Exponents and Powers | Class-7 DAV Secondary Mathematics
- Chapter 5 Application of Percentage | Class-7 DAV Secondary Mathematics
- Chapter 6 Algebraic Expressions | Class-7 DAV Secondary Mathematics
- Chapter 7 Linear Equations in One Variable | Class-7 DAV Secondary Mathematics
- Chapter 8 Triangle and Its Properties | Class-7 DAV Secondary Mathematics
- Chapter 9 Congruent Triangles | Class-7 DAV Secondary Mathematics
- Chapter 10 Construction of Triangles | Class-7 DAV Secondary Mathematics
- Chapter 11 Perimeter and Area | Class-7 DAV Secondary Mathematics
- Chapter 12 Data Handling | Class-7 DAV Secondary Mathematics
- Chapter 13 Symmetry | Class-7 DAV Secondary Mathematics
- Chapter 14 Visualising Solids | Class-7 DAV Secondary Mathematics

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