Question

Please help! Will fan and give medal!
(picture in replies)
Find the value of angle c. Explain/justify your steps.
a = 2x +10
b = 3x + 20

Answer 1

do you know that two intersecting lines form opposite congruent angles?

Answer 2

@darkigloo would that mean that c = 2x-10?

Answer 3

I mean + not - sorry

Answer 4

yes. now that you have b and c, do you know how to solve for x?

Answer 5

c = 2x-10 isn't your answer. You have to solve for x and plug x into c.
Since two lines are intersecting and B and C are adjacent angles, then B+C=180 degrees.
So (3x+20)+(2x+10)=180

Answer 6

Now solve for x and then plug that into c=2x+10 to find out what c is.

Answer 7

@darkigloo Does c = 30 then?