PLS HELP! Which of the following triangles are acute triangles?

a) 5, 14, 20
b) 4.5, 6, 10.2
c) 8, 8, 11
d) 10, 13, 16
e) 4, 7, 9
f) 9, 12, 15

A

Step-by-step explanation:

Add the two smallest numbers if they equal more than the biggest number it is an obtuse triangle. If smaller it's an acute.

-2

7 - 9 = -2

reversed:

-2 + 9 = 7

25 questions , because they start with 100.  

350-100=250 .  

. 250/10=25

step-by-step explanation:

first take off 100, then what x 10 = 250? that is your answer. (25)