ATAR Notes: Forum

VCE Stuff => VCE Mathematics => VCE Mathematics/Science/Technology => VCE Subjects + Help => VCE Specialist Mathematics => Topic started by: chickenpop on October 31, 2010, 04:03:44 pm

Title: I completely forgot how to do tangent to circle questions :P
Post by: chickenpop on October 31, 2010, 04:03:44 pm: I used to know this, but now I can't find it in my notes anywhere. Can anybody help out? :)

(http://img338.imageshack.us/img338/3161/69173696.png)
Title: Re: I completely forgot how to do tangent to circle questions :P
Post by: brightsky on October 31, 2010, 04:27:43 pm: Angle to the circle just implies that $\angle ODA = 90^{\circ}$
Title: Re: I completely forgot how to do tangent to circle questions :P
Post by: 3Xamz on October 31, 2010, 05:13:15 pm: Urgh, how do you do this? ><
I tried resolving the interior angles, but ended up angle BCD being 90-alpha, where alpha is the angle between ODC.
I can't find that.
Title: Re: I completely forgot how to do tangent to circle questions :P
Post by: jasoN- on October 31, 2010, 05:25:39 pm: is it 180-3x?