1) Which circle theorem? a) Angle subtended by chord  b) Angle in semicircle c) Angles in a triangle sum to 180 2) What is angle ABC? a) 90 b) Unknown c) 90 - 30 d) 30 3) Which circle theorem? a) Reflex angle b) Angle subtended by arc at centre and circumference c) Angles in quadrilateral sum to 360 4) What is angle ACB? a) 200 b) 160 c) 50 d) 80 5) Which circle theorem? a) Angles in quadrilateral sum to 360 b) Angles subtended by same arc c)  Cyclic quadrilateral opposite angles 6) What is angle ABC? a) 90 b) 80 c) 180 - 95 d) 85 7) Which circle theorem? a) Cyclic quadrilateral b) Angles subtended by same chord c) Angles subtended by common arc d) Vertically opposite angles e) Angles in a triangle  8) What is angle CBD? a) 180-50 b) X c) 50 d) 360-50 9) What is angle y?  a) 48 b) (180 - 96)/2 c) 36 d) 42 10) Which circle theorem? a) Cyclic triangles b) Tangent makes a right angle c) Ratios of intersecting chords d) Alternate segment 11) What is angle ACB? a) 62 b) 64 c) 54 d) 180 - (64 + 62) e) Not enough information 12) What is x? a) 42 b) 55 c) Not enough information  d) 83 13) Which is true? a) PT + QT = RT + ST b) PT + ST = RT + QT c) PT X QT = RT X ST d) None of these 14) Calculate y a) 10 b) 8 c) 6 d) 12 15) Which is true? a) PT X QT = RT X ST b) PQ x QT = RS x ST 16) Calculate y a) 10.3 mm b) 11 mm c) 12.1 mm d) 6 mm

Circle theorems

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