Respuesta :

mhanifa

Answer:

  • B. 20√3

Step-by-step explanation:

The height of the equilateral triangle with the side x is:

  • h² = x² - (x/2)²
  • h² = 3/4x²
  • h = x*√3 / 2

We have h = 30, then find the value of x:

  • 30 = x*√3 / 2
  • x = 60/√3
  • x = 60√3/3
  • x = 20√3

Correct choice is B

HyperXKid

Answer:  B

Step-by-step explanation: Because mhanifa said so and he is always right