Question

I need help completing this two-column proof:

(I'll post a image of it on my next post for better understanding of what I'm asking...)

Answer 1

Image attached...

Answer 2

The point of this exercise is to get you to remember your algebraic properties.

Answer 3

As well as geometric properties.

Answer 4

Didn't you learn a list of theorems and postulates?

Answer 5

I'm just having trouble with 'B"''... would it be the transitive property? I know my properties, but I just need another opinion somtimes when I'm trying to find the right one... :/

Answer 6

You have to memorize them or you won't do well on the test. I'm sory.

Answer 7

I think B is the transitive property of equality.

Answer 8

this property states a=b and b=c means a=c

Answer 9

Right..

Answer 10

Is that all you needed?

Answer 11

I would ask your teacher though, it is a tricky one.

Answer 12

Yes it is... I'll probably just go with the transitive property though. For the next one "C', I think it's ... well I just need to look at it more.

Answer 13

The substitution property I suppose?

Answer 14

Ummmm

Answer 15

Isn't there some theorem for angles that add up to 180?

Answer 16

obviously a line is 180 degrees, and when you cut it with another line, the two angles will add up to 180.

Answer 17

Isn't it like the "Angle Sum Theorem"?

Answer 18

It might be, I don't even remember that stuff.

Answer 19

I guess I could just put down that since they're supplementary angles, they equal 180 degrees...??