Question

7. The of a rhombus are 16 u allu 12 u. 1diagonals
8. Find the length of the diagonal of a rectangle, the sides of which are 12 cm and 5
9. The sides of a rectangle are in the ratio 2:3 and its perimeter is 20 cm. Find the sides of​

Answer 1

Answer:

Step-by-step explanation:

I am not able to solve question no. 7

8. Let ,

  ABCD is a rectangle

 To the question,

AC^2 = AB^2 + BC^2

=> AC^2 = 12^2 + 5^2

=> AC^2 = 144+25

=> AC^2 = 169

AC = 13

Hence,

  Diagonals = 13cm

9. Let,

 sides be 2x and 3x

To the question,

 2(l+b) = 20

=> 2(2x+3x) = 20

=> 2*5x = 20

=> 10x = 20

=> x = 20/10

=> x = 2

sides = 4cm and 6cm