2D 3D Vocabulary

___________ means “put together.” We use this word to describe putting more than one figure together to make a new shape

• Quadrilateral

• Decompose

• Compose

• Shape

The number of square units that covers all of the faces of a polyhedron (3D figure), without gaps or overlaps is called ________________________________.

• units

• surface area

• volume

• length

These shapes have length, width, and depth. These are objects you can pick up such as rectangular prisms, triangular pyramids, and cubes.

• 2-dimensional

• 3-dimensional

• length

• width

These shapes have only length and width . They can be drawn on a piece of paper and include  squares, rectangles, triangles, and parallelograms.

• Volume

• 3-dimensional

• 2-dimensional

• Surface Area

Each flat side of a 3D shape is called a ________________________. For example, a cube has six of these. 

• height

• length

• width

• face

___________ means “take apart.” We use this word  to describe taking a figure apart to make more than one new shape

• Compose

• Area

• Decompose

• Volume

the number of square units that covers a two-dimensional region, without gaps or overlaps

• Area

• Volume

• Compose

• Decompose

Which of the following is a 2D shape?

• pyramid

• cone

• sphere

• rectangle

The flat part of a 3D shape is called a...

• side

• face

• half

• 3D

The lines of a 3D shape are called...

• edges

• outside

• faces

• vertices