Answer:
Side length (c) = 9 cm
Explanation:
Now we have to,
→ find the side length of the square.
Formula we use,
→ Area of square = (side)²
→ Area = (c)²
Then the value of c will be,
→ Area = (c)²
→ 81 = (c)²
→ (c)² = 81
→ c = √(81)
→ [ c = 9 cm ]
Hence, value of c is 9 cm.