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In geometry, to bisect is to divide a geometric figure such as a line, an angle or any other shape into two congruent parts (or two parts that have the same shape and size).

**You could bisect a segment with a point**

Since point A divides the segment into two parts that have the same size and shape, the segment is bisected.

**You could bisect an angle with a ray**

Since ray AB divides the angle into two parts that have the same size and shape, the angle is bisected.

The word bisect comes from the Latin word bi meaning two and the Latin word sect meaning cut.

Literally, to bisect is to cut into two. In geometry, it means to cut into two equal pieces.