-3.4(-5.5)(3)=. Help me. I need help ASAP

56.1

Step-by-step explanation:

-3.4(-5.5)(3)

18.7(3)

56.1

according to the triangle sum theorem, all the angles in a triangle must add up to 180 degrees. if we know one angle is already 90, we do 180-90=90. the other 2 angles must add up to 90, exactly.

step-by-step explanation:

i believe it’s 165 because if u add 137 and 58 u get 195 and then subtract that from 360 and there’s ur answer