GED Math Practice Test

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What does a bisector do?

It divides an angle into three parts
It divides an angle in half
It intersects two angles
It forms an exterior angle

The correct answer is: It divides an angle in half

A bisector is a geometric term that specifically refers to a line, ray, or segment that divides an angle into two equal parts. This means that when an angle is bisected, each of the resulting angles will have the same measure. For example, if you have an angle that measures 60 degrees and you draw a bisector, it will divide that angle into two angles of 30 degrees each. This property is essential in various applications within geometry, including constructions and proofs, where equal measures are crucial. The other options do not accurately describe the function of a bisector. Some might suggest dividing an angle into three parts, which is not the definition of a bisector, while others mention intersecting angles or forming exterior angles, which are unrelated concepts.