Respuesta :

thebecks

Answer:

11 cm

Step-by-step explanation:

the other two choices are too short

If 30 is the hypotenuse, the other two sides must exceed 30.

cying2180

Answer:

C-11cm

Step-by-step explanation:

The sum of two sides of a triangle must always be bigger than the third!

3+20 is less than 30

6+20 is less than 30

11+20 is greater than 30!

Hope this helps :)