= Angle = 58°. PQ TQ. ATP Calculate the size of angle OTQ. Give a reason for each stage in your working. ................................... ° (Total 5 marks) *28. [Nov 2013] and are diameters of a circle, centre AOC BOD O. Prove that triangle and triangle are congruent. ABD DCA [IGCSE May 2013] 13. and are points on a circle. is a tangent to the circle. A, B, C D PA Angle = 39° Angle = 103° PAD BCD Calculate the size of angle ADB. ................................° (Total for Question 13 is 3 marks) 14 The diagram shows a circle, centre O. is a tangent to the circle at TA A. Angle = 58° and angle = 74°. BAC BAT (i) Calculate angle BOC. (1)
PQ = TQ. Angle ATP = 58°. Calculate the size of angle OTQ. Give a reason for each stage in your working. ................................... ° (Total 5 marks) [Nov 2013] *28. AOC and BOD are diameters of a circle, centre O. Prove that triangle ABD and triangle DCA are congruent. [IGCSE May 2013] 13. A, B, C and D are points on a circle. PA is a tangent to the circle. Angle PAD = 39° Angle BCD = 103° Calculate the size of angle ADB. ................................° (Total for Question 13 is 3 marks) 14 The diagram shows a circle, centre O. TA is a tangent to the circle at A. Angle BAC = 58° and angle BAT = 74°. (i) Calculate angle BOC. (1)
GCSE-CircleTheoremExamQuestions.docx