23.5-6 Volume of a Cylinder

Step 1
Measure the height (h) of the cylinder. Height is sometimes referred to as the length.

Step 2
Measure the radius (r) of the cylinder. Radius is the distance from the outer edge to the center of the circle.

Step 3
Square the radius. (Multiply the radius by itself.)

Step 4
Mulitply the product (radius squared) from step 3 by pi.
Step 5
Multiply the product from Step 4 by the height

Step 6
Write you answer in the proper cubic unit of measurement.

23.4 volumes of Pyramids

The area of a pyramid can be found by using the following equation:

V= 1/3Bh, where B = l x w

This is read as "volume equals one-third base times height." Watch the following video to see why

23.2 Estimate and find Volume

Things to remember:

• Volume is given in cubic units - a little three above the units
• multiply the area of the base (length times width for rectangles - 1/2 lenght times width f or triangles) times the height to find volume

The robot is back...

23.1 Algebra: Surface Area p.502-505

Here is a video that demonstrates finding surface area of a variety of types of prisms. Please excuse the accent.

This video shows how to find surface area for a cylinder.

22.3 Models of Solid Figures

Go to this link from senteacher.org for printable nets that can be used to construct solid figures.

Please make sure to label your solid figure with the following 5 items:

1. Your name
2. Name of the shape
3. Number of faces
4. Number of edges
5. Number of vertices

22.1 Types of Solid Figures

Polyhedron (Polyhedra - plural): solid figure with flat faces that are polygons

• Prism (named for the shape of its bases): polyhedron with two congruent and parallel bases. - The lateral faces(not bases) are rectangles.
• Pyramid (related to a prism) - has a polygon base and triangular sides

NON POLYHEDRON: curved sides with a circular base

• Cylinder: two flat parallel and congruent sides bases and a curved surface.
• Cone: (related to a cylinder) - has one flat circular base and a curved surface leading to a vertex.

The serious video about circumference