Math Grade K-1

2D Shapes: Sides and Corners

Counting sides and corners of flat shapes

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Counting sides and corners of flat shapes

Math - Grade K-1

Instructions: Look at each shape or read each clue. Count the sides and corners carefully. Write your answer on the lines.
  1. 1
    A large blue triangle.

    Look at a triangle. How many sides does it have?

  2. 2
    A large red square.

    Look at a square. How many corners does it have?

  3. 3
    A circle, a triangle, and a rectangle.

    Circle the shape that has 0 corners: circle, triangle, or rectangle.

  4. 4
    A large green rectangle.

    A rectangle has 4 sides. How many corners does a rectangle have?

  5. 5
    A large orange circle.

    Count the sides on a circle. How many straight sides does it have?

  6. 6
    A triangle and a square side by side.

    Which shape has 3 corners: triangle or square?

  7. 7
    A large purple rectangle.

    Look at a rectangle. Count the sides. How many sides does it have?

  8. 8
    A large yellow square.

    Draw a shape with 4 sides and 4 corners. What is the name of one shape you could draw?

  9. 9
    A large green triangle.

    A shape has 3 sides and 3 corners. What shape is it?

  10. 10
    A large blue square.

    Look at the shape with four equal sides. What is its name?

  11. 11
    A triangle and a circle side by side.

    Which has more corners, a triangle or a circle?

  12. 12
    A tall blue rectangle like a door.

    Look at a shape that is long like a door. It has 4 sides and 4 corners. What shape is it?

  13. 13
    A large orange triangle.

    How many corners does a triangle have?

  14. 14
    A square, circle, rectangle, and triangle.

    Circle all the shapes with 4 corners: square, circle, rectangle, triangle.

  15. 15
    A large pink circle.

    Draw a circle. How many corners does your circle have?

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