Question

Find the length of square whose area is 81mm

Answer 1

Answer: 9mm

Step-by-step explanation:

Area=side*side

81 mm²=side²

9 mm= side

Answer 2

Question:-

Find the length of square whose area is 81(mm)²

Solution:-

we know formula of area of square

=> Area of square = (side)²

i.e.

=> (side)² = Area of square

=> (side)² = 81

=> side = √81

=> side = 9 mm

Hence length side of square is 9 mm.

i hope it helps you.