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Parallel and Perpendicular is a free printable Grade 4 math worksheet on classifying pairs of lines, aligned to Common Core standard 4.G.A.1. It prints 5 questions with an answer key on its own sheet of paper, in 25 versions that each ask different questions, so no two students in the class work from the same page. Print it from the browser or download it as a PDF — no account, no email.

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Set 1 has all 25 in a single PDF. All 25 sets ask different questions.

Parallel and Perpendicular

4.G.A.1

NameDate

Sort each pair of lines into the right box.

1.Sort each one into the right box.

Sort: the two strokes of a capital V, the top and bottom edges of a door, two edges meeting at the corner of a page, the two cut edges of a slice of pizza

ParallelPerpendicularNeither
2.Sort each one into the right box.

Sort: the two strokes of a capital T, the two rails of a train track, the two cut edges of a slice of pizza, two lines on writing paper

ParallelPerpendicularNeither
3.Sort each one into the right box.

Sort: the two rails of a train track, the long edges of a ruler, the two strokes of a capital V, the hands of a clock at 2:00

ParallelPerpendicularNeither
4.Sort each one into the right box.

Sort: the two strokes of a capital T, the hands of a clock at 2:00, the two cut edges of a slice of pizza, the long edges of a ruler

ParallelPerpendicularNeither
5.Sort each one into the right box.

Sort: two edges meeting at the corner of a page, the two strokes of a capital L, the two rails of a train track, the long edges of a ruler

ParallelPerpendicularNeither

LessonPrint · 4.G.A.1 · Set 5 · free to copy for classroom use

Answer key — Parallel and Perpendicular

Set 5. Prints on its own sheet.

  1. 1.Parallel: the top and bottom edges of a door; Perpendicular: two edges meeting at the corner of a page; Neither: the two strokes of a capital V, the two cut edges of a slice of pizza
  2. 2.Parallel: the two rails of a train track, two lines on writing paper; Perpendicular: the two strokes of a capital T; Neither: the two cut edges of a slice of pizza
  3. 3.Parallel: the two rails of a train track, the long edges of a ruler; Perpendicular: —; Neither: the two strokes of a capital V, the hands of a clock at 2:00
  4. 4.Parallel: the long edges of a ruler; Perpendicular: the two strokes of a capital T; Neither: the hands of a clock at 2:00, the two cut edges of a slice of pizza
  5. 5.Parallel: the two rails of a train track, the long edges of a ruler; Perpendicular: two edges meeting at the corner of a page, the two strokes of a capital L; Neither: —

Last reviewed 2026-09-05. Aligned to 4.G.A.1 of the Common Core State Standards for Mathematics.