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​Q16: Answers – Paper 2 – June 2018
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Working
a) BCD is a straight line.
Triangle ABC is equilateral.
CE = DE

​Work out the size of angle x.

There is no working for part b!
Question
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16)
a) BCD is a straight line.
Triangle ABC is equilateral.
CE = DE
Work out the size of angle x.
[4 marks]​

​b) Amba is working out the size of an interior angle of a regular octagon.
Her method is         Interior angle = 360 ÷ 8

Is her method correct?
Tick a box.
​Give a reason for your answer.
[1 mark]​​