1. Linesin geometry, the word line refers to a straight line that extends without end in both directions. The line can be referred to as line AB or line. The partof the line from A to B is called a line segment. The notation a B is used to denote the length of the segment.2. Intersecting LinesIf two lines intersect, the opposite angles are called vertical angles and measure.aob have the same angle and COS angles are vertical angles and BOC angles and angle AOD TARGETED are vertical angle. also x + Y = 180
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