Shape Up! Combining Shapes to Make New Ones

Math Grades 1st Grade 2:03 Video
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Lesson Description

Learn how to put different shapes together to create new and exciting shapes! We'll use triangles, rectangles, and circles to make bigger shapes.

Video Resource

Compose shapes | Geometry | Early Math | Khan Academy

Khan Academy

Duration: 2:03
Watch on YouTube

Key Concepts

  • Shapes can be combined.
  • Different shapes can make the same shape.
  • Recognizing shapes and their attributes.

Learning Objectives

  • Students will be able to combine two or more shapes to create a new shape.
  • Students will be able to identify the shapes needed to compose a given shape.
  • Students will be able to differentiate between correct and incorrect combinations of shapes.

Educator Instructions

  • Introduction (5 mins)
    Begin by reviewing basic shapes: circle, triangle, rectangle, and semicircle. Ask students to describe each shape and its properties (e.g., a triangle has three sides).
  • Video Viewing (7 mins)
    Watch the Khan Academy video 'Compose shapes | Geometry | Early Math | Khan Academy'. Pause at different points to ask questions and ensure understanding.
  • Guided Practice (10 mins)
    Using cut-out shapes (circles, semicircles, triangles, rectangles), guide students through composing new shapes. For example, ask them to use two semicircles to make a circle, or two triangles to make a larger triangle.
  • Independent Practice (10 mins)
    Provide each student with a set of cut-out shapes and worksheets with outlines of shapes. Ask them to fill the outlines using the provided shapes.
  • Wrap-up (3 mins)
    Review what they learned. Ask students to share examples of shapes they created and how they made them.

Interactive Exercises

  • Shape Puzzles
    Provide students with simple shape puzzles where they have to combine smaller shapes (e.g., tangrams) to form a larger shape.

Discussion Questions

  • What shapes did we use to make new shapes?
  • Can you think of other shapes we can put together to make something new?
  • What happens if we don't line up the shapes correctly?

Skills Developed

  • Shape Recognition
  • Problem Solving
  • Spatial Reasoning

Multiple Choice Questions

Question 1:

Which shapes can you put together to make a circle?

Correct Answer: Two semicircles

Question 2:

What shape do you get when you put two triangles together like this?

Correct Answer: Triangle

Question 3:

If you put two rectangles together, what shape might you make?

Correct Answer: A bigger rectangle

Question 4:

What shape is half of a circle called?

Correct Answer: Semicircle

Question 5:

Which of these is NOT a shape we used to make other shapes?

Correct Answer: Oval

Question 6:

What can you make by putting two triangles together?

Correct Answer: Another Triangle

Question 7:

If you don't line up shapes correctly, what happens?

Correct Answer: You don't make the shape you wanted

Question 8:

Which one has four sides that are the same length?

Correct Answer: Square

Question 9:

A triangle has how many sides?

Correct Answer: Three

Question 10:

What shape has no sides?

Correct Answer: Circle

Fill in the Blank Questions

Question 1:

Two semi-circles make a ______.

Correct Answer: circle

Question 2:

A shape with three sides is called a ______.

Correct Answer: triangle

Question 3:

A ______ has four sides and four corners, and all sides are the same length.

Correct Answer: square

Question 4:

A ______ is half of a circle.

Correct Answer: semicircle

Question 5:

You can put two ______ together to make a square.

Correct Answer: triangles

Question 6:

A rectangle has ____ sides.

Correct Answer: four

Question 7:

Putting shapes together to make new ones is called ______ shapes.

Correct Answer: composing

Question 8:

A shape that is round is called a ______.

Correct Answer: circle

Question 9:

A rectangle has two long sides and two ______ sides.

Correct Answer: short

Question 10:

When you put two triangles together you can make a ______ or a square.

Correct Answer: triangle

Educational Standards

CCSS.Math.Content.1.G.A.2:Compose two-dimensional shapes (rectangles, squares, trapezoids, triangles, half-circles, and quarter-circles) or three-dimensional shapes (cubes, right rectangular prisms, right circular cones, and right circular cylinders) to create a composite shape, and compose new shapes from the composite shape. (Students do not need to learn formal names such as "right rectangular prism.") CCSS.Math.Content.1.G.A.1:Distinguish between defining attributes (e.g., triangles are closed and three-sided) versus non-defining attributes (e.g., color, orientation, overall size); build and draw shapes to possess defining attributes.

Teaching Materials

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