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Year 9 Interactive Maths - Second Edition


Perpendicular Bisector of a Line Segment

We adopt the following steps to bisect the line segment AB perpendicularly using a ruler and a compass.

Step 1
Draw an arc with centre A and with a radius of more than half of the length of AB.

Step 2

Using the same radius, draw an arc with centre B to cut the arc drawn in Step 1 at P and Q.

Step 3

Join PQ.

PQ bisects AB perpendicularly at M; and PQ is called the perpendicular bisector of the line segment AB.


Key Terms

perpendicular bisector of a line segment

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