Angles (Including Parallel Lines): WJEC GCSE Foundation November 2016 Unit 2 Q11 – Westie's Workshop

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Foundation November 2016 Unit 2 Q11

WJECFoundationCurrent spec3 marksAngles (Including Parallel Lines)Angles in Polygons

11.

Quadrilateral with interior angles x (left), 74° (top) and 117° (bottom left); the bottom side is extended to the right, making an exterior angle of 125° at the bottom right vertex

Diagram not drawn to scale

Find the size of the angle \(x\). [3]

\(x\) = …………… °

Mark scheme

Scheme	Marks	Comments
(Interior angle =) 55(°)	B1	For sight of 55(°). May be on diagram.
(\(x\) =) 360 – (117 + 74 + 55)	M1	F.T. ‘their 55’ but not 125°.
= 114(°)	A1

Alternative method

Scheme	Marks
(x=) 180-74-117+125 or equivalent	M2
= 114(°)	A1

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