Question

(k) Find the perimeter of the rectangle
whose length
is 5cm and a diagonal
is 40cm​

Answer 1

Answer:

perimeter of rectangle is 70m

Answer 2

given side of rectangle is 5cm

diagonal 40 cm

the diagonal divides it into 2 equal triangle

therefore in triangle base is 5 cm

hypotenuse is 40 cm

to find out height

using Pythagoras theoram

a2 + b2 = c2 ( pls note that 2 is square)

(5)2 + (b)2 = (40)2

25 + b2 = 1600

b2 = 1600 - 25

= 1575

b = square root of 1575

after finding square rOot u will get the length and then find perimeter