2D Area & Perimeter: WJEC GCSE Foundation November 2024 Unit 2 Q12

Foundation November 2024 Unit 2 Q12

WJECFoundationCurrent spec4 marks2D Area & Perimeter

12. Owen says,

If the longer side of a rectangle is doubled and the shorter side is halved, then the perimeter of the rectangle will stay the same.

Is Owen correct?
Show clearly, using an example, how you decided. [4]

Mark scheme

Scheme	Marks	Comments
One example of a pair of relevant rectangles or squares considered with the longer side correctly doubled and the shorter side correctly halved.	S1	Sketch shown or lengths clearly stated.
Correct method of finding the perimeter of either rectangle/square.	M1	FT one of ‘their rectangles/squares’ if lengths/width explicitly stated or shown on diagram. If only one rectangle or square is considered, award S0M1 if the correct perimeter or method of finding the perimeter is shown.
Correct perimeters found for both rectangles/squares AND statement that Owen is incorrect (or a statement that the perimeters aren’t the same).	A2	Award A1 for one of the following: one correct perimeter and a correct statement for ‘their rectangles/squares’ both perimeters correctly evaluated for both ‘their rectangles/squares’ without a statement. Ignore additional comments about area. If area is used instead of perimeter: S1 can be awarded for one example of a pair of relevant rectangles or squares considered and an additional SC1 could be awarded for their two (clearly identified) correct areas AND statement that Owen is correct.