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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!

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.

Is her method correct?

Tick a box.

Give a reason for your answer.

**[1 mark]**