Question

Need help am not good at math :(

19. The size of the screen of a TV set is usually given in terms of its diagonal. What is the size of a screen of a TV

set which is 15cm wide and 20cm long​

Answer 1

Step-by-step explanation:

we have to find the question mark of the above photo

According to Pythagoras theorem

let the length of the T.V be x

(20)² + (15)²= x²

(400+225)=x²

625=x²

Underroot 625 = x

x = 25 cm

Answer 2

• by Pythagoras Theorem ,

y = hypotenuse of ∆ = diagonal of rectangle

$\sf {(y)}^{2} = {(20)}^{2} + {(15)}^{2} = 400 + 225 = 625$

$\large \sf \: \: (y) = \sqrt{625} = 25cm$

• Diagonal of Rectangle = 25 cm