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O.2 Learn two dimensional shapes by corners

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What Are 2D Shapes?

2D shapes are flat and only have length and width. These shapes do not have depth or thickness. Children begin by learning four basic shapes: circle, square, triangle, and rectangle.

Example:
  • A square has four equal sides.
  • A circle is round and has no corners.
Note

Focus on one shape at a time before comparing. Use drawings, cutouts, or toys to point out sides and corners.

Describing Shape Features

Each shape has special features. Children can learn to describe shapes using words like straight, round, sides, and corners. This builds strong shape vocabulary.

Example Sentences:
  • “A triangle has three straight sides and three corners.”
  • “A circle has no corners and no sides.”
Note

Use gestures or point while describing. Encourage children to use complete sentences when talking about shapes.

Counting Sides and Corners

Help children understand shapes by counting how many sides and corners each one has. Sides are straight or curved lines. Corners are points where sides meet.

Try This:
  • Count aloud while tracing each side with your finger.
  • Ask, “How many corners do you see?”
Note

Use a marker or finger to trace each side. Repeat several times to build confidence with numbers and shape terms.

Sorting Shapes by Sides

Sorting shapes by their number of sides helps children see patterns. Group shapes that are alike and talk about what makes them different.

Try This:
  • Group all shapes with 3 sides (triangles) in one pile.
  • Put shapes with 4 sides (squares and rectangles) in another pile.
Note

Use clear sorting trays or mats. Say the shape name and side count as each one is sorted.

Using Real-Life Objects

Shapes are all around us. Use everyday objects to help children find and describe 2D shapes in the world.

Example:
  • A clock is shaped like a circle.
  • A book cover might be a rectangle.
Note

Go on a shape hunt at home or school. Ask children to point and name each shape they find.

Drawing and Building Shapes

Children can learn more by drawing or building shapes. This helps them understand how sides and corners fit together.

Try This:
  • Use popsicle sticks or straws to build shapes.
  • Draw a triangle and count the sides aloud.
Note

Let children trace shapes with fingers, pencils, or markers. Say the shape name and its parts as they build or draw.

Comparing 2D Shapes

Comparing shapes helps children think deeply. Talk about what shapes have in common and what makes them different.

Try This:
  • “Which shape has more sides?”
  • “Which shape has no corners?”
Note

Ask open-ended questions. Let children explain their answers to build reasoning and vocabulary.

Tips for Adults

  • Start with basic shapes before adding more variety.
  • Use consistent names like “circle” or “rectangle.”
  • Point to sides and corners while saying the words.
  • Celebrate effort and progress, not just correct answers.
Supportive Activities:
  • Make shape flashcards with side numbers on the back.
  • Sort shape blocks into labeled bins.
  • Play shape games during circle time or centers.
Note

Consistency and repetition support memory. Keep activities fun, simple, and connected to real experiences.

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