Respuesta :

Step-by-step explanation:you have to add the two smallest angle and then the big number 11 you'll see if the 2 angles you added are bigger then your 11

Answer:

True

Step-by-step explanation:

you have to use the triangle inequality theorem

9 + 4 > 11

YES

4 + 11 > 9

YES

9 + 11 > 4

YES

therefore, it's true