Identify the dotted lines as an angle bisector, perpendicular bisector, or a median

Step-by-step explanation:

In each case, "how do you know" is answered by comparing the line to the definitions of the various types of lines.

1. perpendicular bisector --  a perpendicular segment that divides the base into two equal parts

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2. angle bisector -- divides the vertex angle into two equal parts

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3. altitude -- a line from the opposite vertex perpendicular to the side

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4. median -- a line from the opposite vertex to the midpoint of the side

step-by-step explanation:

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