O-LevelMathematicsGeometry4024/12 · Oct/Nov 2022 · Q73 Marks
In the diagram, AD, AB and BC are three sides of a regular pentagon and DC is a diagonal of the pentagon. AB is parallel to DC. [Figure with pentagon ABCD and angles x°, y°] NOT TO SCALE
- (a)Find the value of x.[2]
- (b)Find the value of y.[1]
This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.
Mark scheme
Marking points from the official mark scheme (Oct/Nov 2022). The mark or mark type is shown in brackets.
- [2] 108
- M1 for 180 - 360/5 oe or 180(5-2)/5 oe
- [1] 72
- FT 180- their 108, where their 108 < 180 and their 108 ≠ 90
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