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

One paper per student

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25

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: two lines on writing paper, the top and bottom edges of a door, the two strokes of a capital V, the two rails of a train track

ParallelPerpendicularNeither

2.Sort each one into the right box.

Sort: the top and bottom edges of a door, the two cut edges of a slice of pizza, the hands of a clock at 2:00, the two rails of a train track

ParallelPerpendicularNeither

3.Sort each one into the right box.

Sort: the two strokes of a capital T, two edges meeting at the corner of a page, two lines on writing paper, the long edges of a ruler

ParallelPerpendicularNeither

4.Sort each one into the right box.

Sort: the two sloping sides of a capital A, the long edges of a ruler, the two strokes of a capital V, the hands of a clock at 3:00

ParallelPerpendicularNeither

5.Sort each one into the right box.

Sort: the top and bottom edges of a door, the two rails of a train track, the two strokes of a capital T, the hands of a clock at 3:00

ParallelPerpendicularNeither

LessonPrint · 4.G.A.1 · Set 20 · free to copy for classroom use

Answer key — Parallel and Perpendicular

Set 20. Prints on its own sheet.

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

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