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Which Attribute Matters? is a free printable Grade 1 math worksheet on distinguishing defining from non-defining attributes, aligned to Common Core standard 1.G.A.1. It prints 10 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 1 of 25 · the same problems every time you open this link.

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One paper per student

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All 25 sets ask different questions.

Which Attribute Matters?

1.G.A.1

NameDate

Write yes or no.

1.A triangle has one corner cut off. Is it still a triangle?
2.A hexagon is turned on its side. Is it still a hexagon?
3.A triangle has one side taken away. Is it still a triangle?
4.A hexagon has one side made curved. Is it still a hexagon?
5.A square is moved to the other side of the page. Is it still a square?
6.A square is made much smaller. Is it still a square?
7.A rectangle is moved to the other side of the page. Is it still a rectangle?
8.A rectangle is colored red. Is it still a rectangle?
9.A square has one more side added. Is it still a square?
10.A square has one side made curved. Is it still a square?

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

Answer key — Which Attribute Matters?

Set 1. Prints on its own sheet.

  1. 1.no
  2. 2.yes
  3. 3.no
  4. 4.no
  5. 5.yes
  6. 6.yes
  7. 7.yes
  8. 8.yes
  9. 9.no
  10. 10.no

Questions about Which Attribute Matters?

What does the Which Attribute Matters? worksheet cover?

It practices distinguishing defining from non-defining attributes — 10 questions for Grade 1, all on Common Core 1.G.A.1: Know what makes a shape that shape — sides and corners, not color or size. The instruction to students is “Write yes or no”, and the answer key follows on the next sheet.

Which Common Core standard does Which Attribute Matters? practice?

CCSS.MATH.CONTENT.1.G.A.1 — 1.G.A.1, under Geometry for Grade 1. The published standard reads: “Distinguish between defining attributes versus non-defining attributes; build and draw shapes to possess defining attributes.” The worksheet assesses that standard rather than a paraphrase of it.

What age or grade is this worksheet for?

Which Attribute Matters? is written for Grade 1, typically ages 6-7. It is one of the sheets on 1.G.A.1, so it suits any student working at that standard — including older students revisiting it and younger ones working ahead.

Does Which Attribute Matters? come with an answer key?

Yes. All 10 answers are generated from the same problems as the questions, so the key cannot drift out of step with the sheet. It starts on a fresh sheet of paper, after the questions, so it is not handed out with the class by accident.

How many different versions of Which Attribute Matters? can I print?

25 — one per student, and all 25 ask different questions. Set 1 downloads the whole class as a single PDF. Every version is fixed to its own address, so a sheet printed today holds the same problems when you reopen it next week.

Is Which Attribute Matters? free to print and photocopy?

Yes. Which Attribute Matters?, its answer key and its 25 versions are free to print and photocopy for your own class, with no account, no email capture and no subscription at the download step. Please do not resell them or republish them as your own.

More practice for 1.G.A.1

Know what makes a shape that shape — sides and corners, not color or size.

All Grade 1 worksheets

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