Question

18. In a rhombus, if diagonals are 30 cm and 40 cm, find its perimeter.
19. (a) In figure (i) given below, AB || DC, BC = AD = 13 cm, AB = 22 cm and​

Answer 1

Answer:

18.30/2 = 15 , 40/2 = 20 bisectors of diagonals

Side of the rhombus becomes hypotenuse.

(Side)^2 =(15)^2+( 20)^2 (Pythagoras Theorem)

(Side)^2= 225 + 400

(Side)^2 = 625

Side = + or - 25 (taking square root)

Discarding the negative sign , side = 25 cm

perimeter = 4*side =4*25 =100 cm

Ans : 100cm

19. The question isn't complete

19

Answer 2

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