Coordinates of corners

Use the applet to make some squares. What patterns do you notice in the coordinates?
Exploring and noticing Working systematically Conjecturing and generalising Visualising and representing Reasoning, convincing and proving
Being curious Being resourceful Being resilient Being collaborative




Move the dots below to make some squares. Can you make a variety of squares whose sides are not parallel to the axes?



If you have a set of four coordinates, is there a quick way to decide (without drawing) whether they form a square?