Question

find the perimeter of rectangle whose length is 20cm and digonal is21cm​

Answer 1

Explanation:

one side is 20cm

second side = √(21^2-20^2)

= √(441-400)

= √41

perimeter = 2(l+b)

2(20+√41)

Answer 2

Explanation:

first take out the side using the Pythagoras theoram .And after taking out the other side take out the perimeter of it