Circle Theorems: WJEC GCSE Higher June 2018 Unit 1 Q7

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Higher June 2018 Unit 1 Q7

WJECHigherCurrent spec3 marksCircle Theorems

7. Calculate the size of angle \(x\) in the diagram below. [3]

Diagram not drawn to scale

Mark scheme

Scheme	Marks	Comments
		Answers may be written on the diagram.
(ADC =) 109(°)	B1	Allow for sight of 109(°).
x = 180 −26 – 109	M1	FT ‘their 109°’ (may be clearly indicated on the diagram) provided ≠ 71 and ≠ 26.
= 45(°)	A1	An answer of 45(°) gains all 3 marks.