Angles (Including Parallel Lines): WJEC GCSE Foundation June 2025 Unit 1 Q15

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Foundation June 2025 Unit 1 Q15

15. In the diagram below:

Diagram not drawn to scale

Calculate the value of \(x\). [3]

Mark scheme

Scheme	Marks	Comments
(Angle GFH or GHF = ) (180 – 50) ÷ 2 or equivalent	M1	Check diagram for answers. May be seen in stages.
65(\(^\circ\))	A1	Award A0 if angles GFH and GHF given and GFH ≠ GHF (even if 65 seen.)
(\(x\) = 180 – 65 OR 65 + 50 = ) 115	B1	FT any one of the following: 180 – ‘their GFH’, provided ‘their GFH’≠ 50, unless GFH is explicitly identified as 50. ‘their GHF’ + 50, provided ‘their GHF’ ≠ 50, unless GHF is explicitly identified as 50. Award B0 if 115(\(^\circ\)) seen but then contradicted by final answer of \(x\) = 65(\(^\circ\)).