Question

Can somebody help me with this?

Answer 1

I think the answer is step 3 answer four

Answer 2

Well step 3 isn't even an answer so...
But anyway you know it is either step 1 or step 2

When you look at step 1 it says that all 3 angles add upto 180 and that is true so only C or D could be correct

Answer 3

Looking at C and D they both say the same thing but with different reason

Which theorem says that 2 angles on a straight line equal 180?

Answer 4

I think that is C.

Answer 5

Do you see any parallel lines or bisectors for it to be C?

Answer 6

no

Answer 7

It must be D then.

Answer 8

Yup
See it's just proccess of elimination

Answer 9

Thanks