Mammoth Memory

Examples of perpendicular lines

1.  Are these straight lines perpendicular?

If the lines intersect at 90 degrees then they are perpendicular

The formula for each line is:

                `y = 2x + 4`

And         `y=-1/2x-1`


And ` y=mx+c` where m is the gradient


The test for perpendicular





Yes these lines are perpendicular.

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