Geometry triangle and circle

[true meteor]

1. Wait patiently for a helper to come along.
2. Once someone helps you, say thank you and close the thread with:

+close

3. Feel free to nominate the person for helper of the week in #helper-nominations
4. Do not ping the mods, unless someone is breaking the rules.
5. If you're happy with the help you got here, and the server overall, you can contribute financially as well:

[olive mirage]

I know that CBF is 95°. I can't find CFB, however

[runic ferry]

opposite angles of a cyclic quadrilateral add to 180

hence efb = 180 - 75 = 105

hence cfb = 180 - 105 = 75

so A

[olive mirage]

didn't know that, thanks

[vagrant lichen]

@olive mirage has given 1 rep to @runic ferry

[olive mirage]

+close