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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.

Set 24 of 25 · the same problems every time you open this link.

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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 T, the hands of a clock at 2:00, the two sloping sides of a capital A, the long edges of a ruler

ParallelPerpendicularNeither
2.Sort each one into the right box.

Sort: the two cut edges of a slice of pizza, the two rails of a train track, the hands of a clock at 3:00, two edges meeting at the corner of a page

ParallelPerpendicularNeither
3.Sort each one into the right box.

Sort: the two cut edges of a slice of pizza, the two strokes of a capital V, the two strokes of a capital L, the two strokes of a capital T

ParallelPerpendicularNeither
4.Sort each one into the right box.

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

ParallelPerpendicularNeither
5.Sort each one into the right box.

Sort: the two rails of a train track, the two strokes of a capital L, the two sloping sides of a capital A, the top and bottom edges of a door

ParallelPerpendicularNeither

LessonPrint · 4.G.A.1 · Set 24 · free to copy for classroom use

Answer key — Parallel and Perpendicular

Set 24. Prints on its own sheet.

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

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