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 April 16th, 2013, 10:43 AM #1 Newbie   Joined: Apr 2013 Posts: 2 Thanks: 0 Circle theorem help! Hello guys I have been stuck on a few question. Mainly the last 8 and would it be possible if someone can explain how to do the questions? Would be much appreciated. Thank you! http://tinypic.com/view.php?pic=118hpb7&s=6 On question 17, the letter not shown properly is meant to be 'e'. Thank you for your time! April 16th, 2013, 10:53 AM #2 Global Moderator   Joined: Dec 2006 Posts: 20,927 Thanks: 2205 The link you provided is not working for me. April 16th, 2013, 10:59 AM #3 Newbie   Joined: Apr 2013 Posts: 2 Thanks: 0 Re: Circle theorem help! Hmm, I've re-uploaded it onto a different hosting website. Does this work? - http://i166.photobucket.com/albums/u107 ... 18hpb7.jpg April 16th, 2013, 08:54 PM   #4
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[attachment=0:2dvnw5mk]118hpb7.jpg[/attachment:2dvnw5mk]
13.� t = 2*32 = 64; t + 2n = 180, so n = 58.
14.� a = 50 - 18 = 32. Angle ACB = 90, so b = c = 40.
15.� 4a + a + a + c = 180 and c = 4a, so a = 18 and c = 72.
16.� Angle BDC = 35 and angle ADC = 90, so x = 55.
17.� f = e = g and e + g = 82, so e = f = g = 41.
18.� Angle BAC = 32 and angle OAC = 40, so z = 8.
19.� x = (180 - 120)/2 = 30, so y = 180 - 95 + 30 = 115.
20.� Angle OAB = 50, so x = 180 - 50 - 50 = 80.
� � � �Angle BAC = angle BCA = x/2 = 40, so z = 50 - 40 = 10.
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