MyMathKidK-8 Curriculum

Grade 1 Geometry: 2D Shapes

Learn to identify flat shapes

What You'll Learn

Identify circles, squares, triangles, and rectangles
Recognize shapes in the environment
Describe shape attributes

📖What are 2D Shapes?

2D shapes are flat shapes. They have length and width but no thickness. You can draw them on paper!

✏️Common 2D Shapes

Circle - round, no corners. Square - 4 equal sides, 4 corners. Triangle - 3 sides, 3 corners. Rectangle - 4 sides, 4 corners.

💡Look Around

Can you find shapes in your classroom? A clock is a circle, a door is a rectangle!

Worked examples

Real problems from the practice worksheets, solved one step at a time.

Example 1
A cheese slice is shaped like a ___.
1. Picture a cheese slice.
2. A square has 4 sides that are all the same length and 4 corners.
3. So a cheese slice is shaped like a square.
Answer: square
Example 2
A sticky note is shaped like a ___.
1. Picture a sticky note.
2. A square has 4 sides that are all the same length and 4 corners.
3. So a sticky note is shaped like a square.
Answer: square
Example 3
Is this a hexagon or a triangle?
1. A hexagon has 6 straight sides and 6 corners. A triangle has 3 straight sides and 3 corners.
2. Count the sides and corners of this shape: it has 3 straight sides and 3 corners.
3. So it is a triangle.
Answer: triangle

Practice Worksheets

2D Shapes 1

Identify circles, squares, triangles, and rectangles

2D Shapes 2

More practice identifying 2D shapes

2D Shapes 3

Additional 2D shape practice

2D Shapes 4

Keep practicing 2D shapes

2D Shapes 5

Master 2D shape identification

Sides and Corners