That one is quite simple. On the sketch, you get

w+x+y+z=360º

Making the substitution with x+y=w+z, you get

w+w+z+z=360º <=> 2(w+z)=360º <=> w+z=180º

Proving AOB is a line, because the sketch provides, that w+z is an angle of AOB.

I am pretty sure, you were not asking for the proof, but I wanted to do it anyways. Does a genuine proof count as an anti meme?

x + y + z + w = 360 because... Uh. I don't remember what the terms to use are but it does. It's a full circle. It's 4 points and 4 angles.

2 (x + y) = 360 because substitute x + y = z + w

x + y = 180 because you divide each side by 2

because x + y is 180, AOB is a line.

That's the best I can do. I may have forgotten a few steps about things you can't assume.

Maybe thee is an elegant way but

X+y+w+z=360°

Given X+y=w+z

Therefore we can sub X+y with w+z

(W+z)+(w+z)=360°

2(W+z)=360°

Divide both sides by 2

W+z=360°/2

W+z=180°

Straight lines are defined as having/being 180 angle

It's a trick question. Question didn't say whether AOB is a straight line or a gay one

Pleased to see everyone solving the math problem in the antimeme, I did too!

Did you not learn anything from your high school that's easy🥲

Just intuitively, it says they're equal, and the paired angles are adjacent. The only time two halves of a full circle have equal angles is half way.

You guys are all creative/smart. I would have held my ruler against the line and then traced around it with my pencil.