Thread: I need help with these geometry please?

http://img33.imageshack.us/img33/335...ialangles6.jpg



Please explain. Thanks

What does the notation with two letters and the curved line on top mean?

Let be the centre of the circle. The information tells you that Now use the theorem that the angle at the centre is twice the angle at the circumference to find Can you see how to continue the problem from there?

Hi zokura,
This is what you need to know

angle between secants = 1/2( far arc - near arc)
angle between chords =1/2 the sum of arcs created by each equal vertical angle