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Sides and Corners of 2D Shapes

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Tip: download the PDF for Letter or A4 paper, print it at 100% and use a pencil or crayon. Tap "Show solution" to check your answer, or print it as an answer key.

Up nextShapes in Real Life: Matching Worksheet →

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Eight flat shapes to count: a triangle, square, rectangle, rhombus, trapezoid, pentagon, hexagon and octagon. Some are turned at an angle, because a shape keeps its sides and corners whichever way it faces. For each one children write how many straight sides it has and how many corners (vertices). They soon notice that the two numbers always match for these shapes. Page 2 is the answer key.

Also try: Shapes in Real Life: Matching Worksheet · Shape Patterns: What Comes Next? · Equal Parts Worksheet

Tips for this shapes worksheet

  • Put a dot on each corner as you count it, so none is counted twice.
  • Run a finger along each side and count out loud.
  • A turned shape has the same number of sides.

Page 2 of the PDF is the answer key. Cut-out shape templates make good counters for sorting and patterns. When this sheet feels easy, move on to the sides and corners worksheet and the 3D shapes coloring page. See all shapes worksheets.

For teachers and parents

What it practises
Naming 2D shapes and finding them in real life, sides, corners, patterns and sorting, 3D shapes: faces, edges and vertices
How to use it
Keep real things on the table: a ball, a box, a can, a party hat. Turn the flat shapes around so children learn that a turned triangle is still a triangle. Answers on page 2.
Time
About 10–15 minutes

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Paste this into your school, class or library web page. It shows the picture and a link back here, so families can print it themselves. You can change the wording.

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More shapes worksheets

See all shapes worksheets →

Collections: First Grade Math Worksheets

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Printing tips

  • Hold up real things (a ball, a box, a can) next to the 3D sheets.
  • Turn a shape around: a triangle upside down is still a triangle.
  • Mark with page 2, then redo the wrong ones the next day.

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