Decompose 2D Shapes

What does "Decompose" mean?

• Put the shapes together

• Break down the shapes

• Put the shapes aside

• Break the shapes and put them together

How many triangles in the picture?

• 1

• 2

• 3

• 4

How many triangles are in the picture?

• 4

• 3

• 2

• 1

Who am I? I have 2 LONG sides and 2 short sides. I also have 4 corners.

• Triangle

• Square

• Rectangle

• Circle

To break a complex shape into shapes or pieces you know is called _____;

• Decompose

• Compose

• Area

• Volume

What does it mean to decompose a shape?

• break a figure into pieces

• move the shape around

• build a shape

• none of the above

Look at the rhombus.

What two shapes can be put together to make this rhombus?

• 
• 
• 

​ (a)   Triangles

​ (b)   Squares

​ (c)   Rectangle

​ (d)   Trapezoids

• 2

• 0

• 1

• 3

• 4

• 5

• 6

• 7

• 8

• 9

We can form a rectangle by combining 2 __________.

• circles

• squares

• triangles

What shape can these 2 pattern blocks make together?

• hexagon

• square

• triangle

• rectangle