A screen shot of a curling match at the Winter Olympics. The end has finished with two red stones and one yellow stone that appear almost equidistant from the centre of the circle. The referee is trying to determine whether each of the red stones is closer to the centre than the yellow stone. There is a measuring rod attached to the centre of the circle, with a marker set to the inner edge of the yellow stone. The referee will pivot the rod around the centre of the circle to see whether the marker touches each of yhe two red stones.
A screenshot of a maths task. There is a cross on the page with ten points marked around it, each a similar distance from the cross. The question says: Aisha marks a cross on a piece of paper and marks a point exactly 5 units away from it. She asks everyone else to mark a point 5 units away from the cross. a) How could you use a pair of compasses to check whether everyone's point is the correct distance away from the cross? b) Whose point is too close to the cross? c) Whose point is too far from the cross?
Just been catching up with some Winter Olympics curling. It was fun to see how the referees determine close call decisions by using the same method as KS3 students do in this task about constructions on
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