Linear Equations

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

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

Less than a minute

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