2D Area & Perimeter: WJEC GCSE Foundation November 2023 Unit 1 Q9

Foundation November 2023 Unit 1 Q9

WJECFoundationCurrent spec5 marks2D Area & Perimeter

9. In this question, you will be assessed on the quality of your organisation, communication and accuracy in writing.

The diagram below shows a shape made by joining two identical rectangles together.
Each rectangle is 8 cm long and 5 cm wide.
The length of AB is 6 cm.

Calculate the perimeter of the shape.
You must show all your working. [3 + 2 OCW]

Two 8 cm by 5 cm rectangles, one above and to the left of the other, overlapping along the dashed segment AB of length 6 cm

Diagram not drawn to scale

Mark scheme

Scheme	Marks	Comments
(Shorter length = 8 – 6 =) 2 (cm)	B1	May be seen on the diagram
(Perimeter of whole shape =) 2×(5 + 8 + 5 + 2)	M1	Or equivalent FT ‘their stated or derived 2’
40 (cm)	A1
Organisation and Communication	OC1	For OC1, candidates will be expected to: present their response in a structured way explain to the reader what they are doing at each step of their response lay out their explanation and working in a way that is clear and logical write a conclusion that draws together their results and explains what their answer means
Accuracy of writing	W1	For W1, candidates will be expected to: show all their working make few, if any, errors in spelling, punctuation and grammar use correct mathematical form in their working use appropriate terminology, units, etc

Alternative method

Scheme	Marks	Comments
(Perimeter of one rectangle = 8+5+8+5 =) 26 (cm)	B1	May be seen in later workings
(Perimeter of whole shape =) 2×26 - 2×6	M1	Or equivalent FT ‘their 26’
40 (cm)	A1