Question

I really don't understand...
fan, medal, testimony
picture below

Answer 1

Hey Izzy :)
When a quadrilateral is inscribed in a circle, the opposite angles are always `supplementary`.

Answer 2

So for example, we can say that Angles A + C = 180 degrees.
This is true because A and C are supplementary.

Answer 3

so B? I was debating it

Answer 4

We shouldn't look at any of the = 90 options.

Answer 5

oh yeah because a line is 180. C then because its the only one positive

Answer 6

In option C, they are not adding two angles together to get 180, they're supptracting... that's not very helpful for us :(

Answer 7

subtracting*

Answer 8

oh snap. I looked at thewrong signs