Download 5.3 Prisms Pyramids and Cylinders

06/01/2014
5.3 Geometric Solids
3. Regular Polyhedrons:
Solids are shapes with a closed, rigid surface that contains a
space.
2. Polyhedral Solids:
1. Curved Solids:
One or more of the faces are
curved
Every side (or face) is
congruent. Therefore, every
side is identical in size and
shape.
4. Non Regular Polyhedron:
Every side is NOT Congruent
All of the faces are polygons
1
PRISMS:
2
PYRAMIDS:
Formed by taking a 2D object and dragging it to make a 3D
solid.
The name of the pyramid refers to the shape of its base.
Square Prism
Triangular base Prism
Note: The prism is named after the shape of the base!!!!
(not the lateral faces)
Properties of Prisms:
• the bases are parallel and congruent
• the lateral faces are perpendicular to the base
• the height is the length of one of the lateral edges
Properties of Pyramids
• a polygon makes the base
• the lateral faces are triangles
• the height of each face is called the slant height
• a pyramid is right when the height from the apex touches
the base at 90°
3
4
CYLINDERS:
Formed by taking a circle and dragging it to make a 3D solid.
Practice:
Page 163 # 1-5
Congruent bases
Note: Cylinders can either be right or oblique
Properties of Cylinders
• two discs with the same radius make the bases
• the radius of the base is the radius of the cylinder
• the height is the distance from disc to disc
5
6
1