You can put shapes together to make a new shape. You can use flat shapes to make new flat shapes and new solid shapes.

**To better understand how to create new shapes from existing ones…**

## LET’S BREAK IT DOWN!

### Review flat shapes.

Circles, triangles, rectangles, squares, and hexagons are all flat shapes. A circle is a round shape with no sides or corners. A triangle has 3 sides. A rectangle has 4 sides and 4 square corners. A square is a special type of rectangle with all sides the same length. A hexagon has 6 sides.

### Make new shapes out of pizza triangles.

You have special pieces of pizza shaped like triangles. You can put shapes together to make a new shape. You can put 2 of these triangles together to make a square. You can put 4 of these triangles together to make a rectangle.

### Make new shapes out of quilt patches.

You have quilt patches that are squares and triangles. What shapes can you make? You could put 1 square and 2 triangles together to make a new shape, called a trapezoid. Then, you could put two trapezoids together to make another new shape, a hexagon.

### Make a solid shape out of 6 squares.

A flat shape is made up of 6 squares. If you fold it up, what shape do you have? You have a cube. It is a cube because it is not flat and it has 6 square faces.

### Make a new shape out of 2 cubes.

You have 2 cubes. What new shape can you make if you combine the cubes? The new shape has 6 rectangular faces, so it is a rectangular prism.

## CREATE NEW SHAPES FROM EXISTING ONES VOCABULARY

## CREATE NEW SHAPES FROM EXISTING ONES DISCUSSION QUESTIONS

### [Hold up or draw two identical right triangles with all three sides of different lengths.] How can you use these shapes to make a rectangle?

### [Use the rectangle created in the previous question and another identical rectangle.] How can you use these two rectangles to make a new rectangle?

### [Hold up or draw three identical equilateral triangles.] How can you use these three shapes to make a trapezoid?

### [Hold up or draw six rectangles that could form a rectangular prism. To make sure they could form a rectangular prism, you can use a cereal or tissue box as a model. Or, make two rectangles with dimensions a × b, two with dimensions a × c, and two with dimensions b × c.] What 3D shape can you make from these six shapes?

### [Hold up or draw three identical cylinders.] How can you use these shapes to make a new cylinder?

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