Respuesta :

Answer:

E. 15

Step-by-step explanation:

Use the Pythagorean theorem: a²+b²=c²

  • 9²+ 12²= c²  (This is the info we have so far.)

  • 81 + 144 = c² (Simplify. 9² = 81 ; 12² = 144)

  • 225 = c² (Added 81 + 144 = 225)

  • √225 = 15 (Square root of 225 is 15.)
balabedali939816

Answer:

Step-by-step explanation:

15