Question

parallel
lines

• ______ lines that never ______.
• ________ are used to indicate the lines are parallel.
• symbolic notation: ________

parallel
planes

• ______ that never ______.
• symbolic notation: ________

Explanation:

Fills in the blanks based on the definitions and notation of parallel lines and planes in geometry.

Answer:

Parallel Lines

• Parallel lines that never intersect (or cross).
• Arrow marks (on the lines) are used to indicate the lines are parallel.
• Symbolic Notation: $\overleftrightarrow{AB} \parallel \overleftrightarrow{CD}$

Parallel Planes

• Planes that never intersect (or cross).
• Symbolic Notation: $\mathcal{J} \parallel \mathcal{X}$