wunder beta🛤️ Parallel and Perpendicular Lines
Parallel lines run side by side and never meet, like train tracks. Perpendicular lines cross at a perfect right angle. Learn to spot both!
What you’ll learn
- Parallel LinesIdentify parallel lines as lines that stay the same distance apart and never meet.Parallel lines are always the same distance apart and never meet, no matter how far they go, like two railroad tracks or the rungs of a ladder. The test is simple: if the lines would ever cross, they are not parallel. Parallel lines keep the same gap the whole way.
- Perpendicular LinesIdentify perpendicular lines as lines that cross at a right angle of 90 degrees.Perpendicular lines meet, but they cross at a perfect right angle of exactly 90 degrees, making a neat square corner like a plus sign or the letter T. The big difference between the two kinds of lines is whether they cross: parallel lines never meet, while perpendicular lines cross at a right angle.
Questions this course answers
What is special about PARALLEL lines?
Parallel lines stay the same distance apart and never meet.
Which of these shows parallel lines?
Railroad tracks stay the same distance apart and never meet, so they are parallel.
If two lines would eventually cross, are they parallel?
Parallel lines never meet, so lines that would cross are not parallel.
When two lines are PERPENDICULAR, they meet at a...
Perpendicular lines cross at a right angle, exactly 90 degrees.
Which shape shows perpendicular lines?
A plus sign has two lines crossing at a right angle, so they are perpendicular.
What is the biggest difference between parallel and perpendicular lines?
Parallel lines never cross, while perpendicular lines cross at a right angle.
Grounded in trusted sources
- PBS Kids — shapes and geometry
- Khan Academy Kids
- Britannica Kids
- National Council of Teachers of Mathematics
Every Wunder lesson is built from real, reputable sources — never invented.
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