Transcript No Slide Title

Understanding Solid Figures
A Mini Lesson by Diana Dell
What is a solid figure?
•A solid figure is a three-dimensional figure.
•“Three- dimensional” means that the figure has
measures in three directions, such as length,
width, and height.
Examples of solid figures:
cube
triangular
prism
square
pyramid
rectangular
prism
sphere
triangular
pyramid
cylinder
cone
http://www.harcourtschool.com/glossary/math_advantage/definitions/solid_f5.html
What are the parts of a solid figure?
•The face is the flat
surface of a solid figure.
•The vertex is the
point where three or
more edges of a solid
figure meet. The
vertex is sometimes
called a corner.
•The edge is the line
segment where two
faces of a solid figure
meet.
vertex
What are the parts of a solid figure?
• The base is the
face of a solid
figure by which the
figure is named.
base
Examine some solid figures by watching this video clip.
Some solid figures have a curved surface.
cone
cylinder
curved surface
What’s the difference between
a prism and a pyramid?
A solid figure whose base is a polygon and
whose other faces are triangles with a common
vertex is a pyramid.
These are pyramids.
What’s the difference between
a prism and a pyramid?
A solid figure whose ends are congruent,
parallel polygons, and whose sides are
rectangles is a prism.
These are prisms.
Practice counting vertices:
Remember to count the vertices that you can’t see.
8
0
4
Practice counting faces:
Remember to count the faces that you can’t see.
4
6
1
Click on the solid figure described below.
I have one base and one vertex.
No, a cylinder has 2 bases.
No, this pyramid has 4 vertices!
Yes, a cone is correct.
Click on the solid figure described below.
I have 6 square faces and 8 vertices.
No, this prism does not have square faces.
No, this pyramid has triangular faces.
Yes, cube is correct!