Respuesta :

wegnerkolmp2741o

Answer:

10 cm

Step-by-step explanation:

The perimeter of a equilateral triangle is

P = 3s where s is the side length

30 = 3s

Divide each side by 3

30/3 = 3s/3

10 = s
10cm. perimeter is simply adding up all the sides. so 10+10+10 is 30 giving you each side of a 3 sided figure