TN MATHS CLASS 7 MATHS - CHAPTER 2 - EXAMPLE 2.8 скачать в хорошем качестве

TN MATHS CLASS 7 MATHS - CHAPTER 2 - EXAMPLE 2.8

THANKS FOR WATCHING !! Questions : Example 2.6 Find the area of the rhombus whose side is 17 cm and the height is 8 cm. Example 2.7 Calculate the area of the rhombus having diagonals equal to 6 m and 8 m. Example 2.8 If the area of the rhombus is 60 sq. cm and one of the diagonals is 8 cm, find the length of the other diagonal. Example 2.9 The floor of an office building consists of 200 rhombus shaped tiles and each of its length of the diagonals are 40 cm and 25 cm. Find the total cost of polishing the floor at ` 45 per sq.m. Exercise 2.2 : 1. Find the area of rhombus PQRS shown in the following figures. 2. Find the area of a rhombus whose base is 14 cm and height is 9 cm. 3. Find the missing value. 4. The area of a rhombus is 100 sq. cm and length of one of its diagonals is 8 cm. Find the length of the other diagonal. 5. A sweet is in the shape of rhombus whose diagonals are given as 4 cm and 5 cm. The surface of the sweet should be covered by an aluminum foil. Find the cost of aluminum foil used for 400 such sweets at the rate of ` 7 per 100 sq. cm. Objective type questions : 6. The area of the rhombus with side 4 cm and height 3 cm is (i) 7 sq. cm (ii) 24 sq. cm (iii) 12 sq. cm (iv) 10 sq. cm 7. The area of the rhombus when both diagonals measuring 8 cm is (i) 64 sq. cm (ii) 32 sq. cm (iii) 30 sq. cm (iv) 16 sq. cm 8. The area of the rhombus is 128 sq. cm and the length of one diagonal is 32 cm. The length of the other diagonal is (i) 12 cm (ii) 8 cm (iii) 4 cm (iv) 20 cm 9. The height of the rhombus whose area 96 sq. m and side 24 m is (i) 8 m (ii) 10 m (iii) 2 m (iv) 4 m 10. The angle between the diagonals of a rhombus is (i) 120º (ii) 180º (iii) 90º (iv) 100º