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​Q16: Answers – Paper 5 – June 2018

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Content:

• Part A) Circle Theorem
• Part B) Circles Theorem​

Quizzes:

• Part A) Circle Theorem
• Part B) Circle Theorem

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Mark Scheme

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Working
A, B, C and D are points on the circumference of a circle. 

​PQ is a tangent to the circle at D.
Angle BDQ = 72° and angle ABD = 63°

a) Work out angle x.
Give a reason for your answer.

​b) Work out angle y.
Give a reason for your answer.

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Question

16) A, B, C and D are points on the circumference of a circle. 

PQ is a tangent to the circle at D.
Angle BDQ = 72° and angle ABD = 63°

a) Work out angle x.
Give a reason for your answer.

Angle x = ...................° because ............................................................

[2 marks]​

b) Work out angle y.
Give a reason for your answer.

Angle y = ...................° because ............................................................

[2 marks]​

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