Angles in Polygons: WJEC GCSE Intermediate November 2024 Unit 1 Q6

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Intermediate November 2024 Unit 1 Q6

6. Three of the four vertices of a parallelogram have the following coordinates.

(4, 3) (5, –1) (8, 3)

Plot these points on the coordinate grid below.

Then, plot all three possible points for the fourth vertex.
Write down the coordinates of these three points. [4]

The three possible points for the fourth vertex are
(……… , ………) (……… , ………) (……… , ………)

Scheme	Marks	Comments
Plotting the three given points (black crosses below).	P1
Three correct possible points for the 4^th vertex plotted (red crosses below) AND correct coordinates given. (7, 7) (9, -1) (1, –1)	B3	Answer lines take precedence. For P1 B3 only 6 points should be plotted on grid. Award B2 for one of the following: correct coordinates of at least two possible points for the 4^th vertex 3 possible points for the 4th vertex are indicated on the grid but coordinates not given or given incorrectly with no more than 6 points on the grid. Award B1 for one of the following: correct coordinates of one possible point for the 4^th vertex 2 possible points for the 4th vertex are indicated on the grid but coordinates not given or given incorrectly with no more than 6 points on the grid.