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Count the Corners is a free printable Grade 1 maths worksheet on counting vertices, aligned to Common Core standard 1.G.A.1. It prints 6 questions with an answer key on its own sheet of paper, in 25 versions that each ask different questions, so no two pupils 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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One paper per pupil

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

Count the Corners

1.G.A.1

NameDate

How many corners does each shape have?

1.
How many corners?
2.
How many corners?
3.
How many corners?
4.
How many corners?
5.
How many corners?
6.
How many corners?

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

Answer key — Count the Corners

Set 24. Prints on its own sheet.

  1. 1.3
  2. 2.3
  3. 3.5
  4. 4.3
  5. 5.0
  6. 6.5

More practice for 1.G.A.1

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

Teaching this next? What Makes a Shape That Shape is the 40-minute plan for it, with the misconceptions to expect.

All Grade 1 worksheets

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