Hi Gui, can you explain, the angles 20,35, 70 and 120 degrees.
Between AG and AF, I can see 20 and 70 degrees. That is not clear to me.
I'm in need of some help again! :/ We're learning about tangents right now, I've got a test tomorrow morning. I've spent at least 5 hours in these 4 problems these past two days, and all I could figure out was 14 (55º).
Please help! Thanks in advance!
 Find m
This angle is formed by the intersection of secants AF and AG.
The measure of the angle is equal to the difference of the measures of the intercepted arcs.
This angle is formed by the tangent MH and chord MG.
The measure of the angle is equal to one-half the measure of its intercepted arc.
The intercepted arc here is .
You already know the measure of
You can find easily by subtracting arcs BC, CM, and FG from 180 since BG is a diameter.
Then add arcs FG and MF to get the intercepted arc you need. Then take half of it for your answer.
 Find m
This angle is formed by the intersection of two chords.
The measure of the angle is equal to one-half the sum of the measures of the intercepted arcs.
The intercepted arcs are CM and FG.
Your answer is incorrect.
 Find BE.
I don't see any segment measures at all in this figure. Therefore, BE cannot be determined.