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Enclosing Squares

Can you find sets of sloping lines that enclose a square?

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Parallel Lines

How does the position of the line affect the equation of the line? What can you say about the equations of parallel lines?

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Weekly Problem 35 - 2007

What is the area of the triangle formed by these three lines?

Perpendicular Lines

Stage: 3 Challenge Level: Challenge Level:3 Challenge Level:3 Challenge Level:3

Alter the positions of the lines by moving the points.

Position the lines so that they are perpendicular to each other.
Try various arrangements.

What can you say about the equations of perpendicular lines?

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