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iGCSE (2021 Edition)

11.17 Perpendicular lines (Extended)

Interactive practice questions

Select the single best definition that describes two perpendicular lines.

Two lines that intersect each other at an angle of 90°.

A

Two lines that have only one intersection.

B

Two lines whose product of gradients is equal to $1$1.

C

Two lines that have no intersections.

D
Easy
< 1min

If two lines are perpendicular, what is the product of their gradients?

Easy
< 1min

Are the lines $y=x+1$y=x+1 and $y=x-1$y=x1 perpendicular?

Easy
< 1min

Are the lines $y=3x-7$y=3x7 and $y=-3x+6$y=3x+6 perpendicular?

Easy
< 1min
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Outcomes

0607C4.5

Gradient of parallel lines.

0607E4.5

Gradient of parallel and perpendicular lines.

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