Question

which set of three angles could be the three angles of a triangle?

A. 25,25,25
B. 50,50,50
C. 60, 60,60
D. 100,100,100

2. what is x?

Answer 1

For the first one, you'd do well to recall that the three angles of a triangle must ALWAYS add up to 180...

Answer 2

Actually, that's kinda the point in the second question too ;)

Answer 3

for your second question the answer to x is 36 because 180-108 gives you 72. So 72 must be shared equally by the remaining two angles. Hence, the answer is 36.

Answer 4

for your first question the answer is 60,60,60 because all angles in a triangle must add up to 180. That's the only choice that satisfies that.