Three Dimensional Figures What is the difference between

Three –Dimensional Figures -What is the difference between prisms and pyramids?

What are three-dimensional figures? • A three-dimensional figure encloses a part of space. • In other words it can hold something (water, air, etc. ) • It has Volume.

Features of a 3 -D figure • Face- the flat surface of a figure Edge • Edge- formed by two faces of a 3 -D figure sharing a side • Vertex (plural: vertices)the point at which three or more edges meet Faces Vertex

Identify the number of faces, edges, and vertices on each three-dimensional figure. A. 5 faces 8 edges 5 vertices 4 faces B. 6 edges 4 vertices

Identify the number of faces, edges, and vertices on each three-dimensional figure. A. 6 faces 12 edges 8 vertices B. 5 faces 9 edges 6 vertices

Two main types of 3 -D Figures • Prism: – Has at least three faces that are rectangles – Has two congruent faces on the top and bottom called bases – The shape of the base tells what type of prism the figure is • Pyramid: – Has at least three faces that are triangles – Has only one base – The shape of the base tells what type of pyramid the figure is

Prisms Rectangular Prism Triangular Prism

Pyramids Square Pyramid Triangular Pyramid

Let’s Play Name that Figure!

Rectangular Prism

Triangular Prism

Cube

Square Pyramid

Triangular Pyramid

Polyhedron A 3 -dimensional figure that has polygons as faces Polygons must have straight lines! Polyhedrons Not Polyhedrons