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.
1.G.A.1
How many corners does each shape have?
LessonPrint · 1.G.A.1 · Set 19 · free to copy for classroom use
Set 19. Prints on its own sheet.
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.
Last reviewed 2026-09-05. Aligned to 1.G.A.1 of the Common Core State Standards for mathematics.