What is the measure of the angle formed by two tangents drawn to a circle from an external point if they intersect a minor arc whose measure is 90°?

Question

anonymous · Answer

attachment

anonymous · Answer

Please help!

nikato · Answer

Wait, the diagram says 70 but your problem says 90

anonymous · Answer

I think it was just telling me to put 90 were 70 was..

nikato · Answer

Ok. Do you know how to make two right triangles by adding three lines to the diagram?

anonymous · Answer

I just started this and the reading sucks, I dont know how to do any of it.

nikato · Answer

sorry. iwas gone. but heres the problem
|dw:1394505108685:dw|

nikato · Answer

|dw:1394505388623:dw| you know those are right angles because the radius is tangent or perpendicular to that line