Question

the area of a square is 81cm*2 whose side is 9cm.find it's diagonal​

Answer 1

Answer:

by Pythagoras theorem

side² + side² = diagonal ²

2side² = diagonal ²

diagonal = √2 x side

diagonal = √2 x 9

diagonal = 9√2cm

Answer 2

Answer: 162 root or 12.728( approximately)

Step-by-step explanation:

Area = 81 cm^2

Side = 9 cm

9^2 + 9^2 = c^2

81 + 81 = c^2

162 = c^2

162 root = c

Or

12.728(approximately)