Respuesta :

Answer:

  • D. 5√2/2

Step-by-step explanation:

Given triangle is right isosceles since one of the angles is 45°

Let the AC = x, then BC = x and AB is:

  • x² + x² = 5²
  • 2x²=5²
  • x²= 5²/2
  • x = 5/√2
  • x = 5√2/2

Correct option is D