G.LA.1

Use precise definitions and standard geometric notation for angles, perpendicular lines, parallel lines, and line segments based on the undefined notions of point, line, and distance along a line.

Example Problems
What do the following two equations represent: parallel lines, perpendicular lines, or the same line?

What do the following two equations represent: parallel lines, perpendicular lines, or the same line?

What do the following two equations represent: parallel lines, perpendicular lines, or the same line?

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