Respuesta :
Answer:
40 cm.
Step-by-step explanation:
A square by definition has 4 congruent sides.
Area of a square = side x side, or s²
Area of a square = 100 cm
s² = 100
√s² = √100
s = 10
Perimeter of a square = 4 * s = 4 * 10 = 40
40 cm is your answer.
~