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O-LevelMathematicsGeometry4024/11 · May/June 2024 · Q73 Marks

A square and a regular pentagon are joined along one edge as shown in the diagram. [Figure: Diagram of a square and a regular pentagon joined, with an interior angle labeled x, and text "NOT TO SCALE"] Calculate the value of x.

  1. (a)Calculate the value of x.[3]

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Mark scheme

Marking points from the official mark scheme (May/June 2024). The mark or mark type is shown in brackets.

  1. [3] 162
  2. B2 for [exterior] 72 or [interior] 108 seen
  3. or M1 for 360/5 or (5-2)/5 × 180

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About this question

Topic
Geometry, O-Level Mathematics (syllabus 4024). Structured question, 3 marks.
Source
O-Level Mathematics, May/June 2024 Paper 1 Variant 1, question 7.

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