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Lesson 10-6Solid Figures
Review
What is the formula for the circumference of a circle? C=∏d
What is the formula for the area of a circle? A= ∏r
What does ∏ equal? 3.14
Solid Figures
By the end of this lesson you will be able to name solid figures.
Vocabulary
Polyhedron A three dimensional object, or solid figure, with
flat surfaces, called faces, that are polygons. Edge
When two faces of a solid figure share a side Vertex
A point at which three or more edges meet
Practice
How many faces, edges, and vertices does each figure have?
Prisms
A Polyhedron with two congruent, parallel bases, and other faces that are all parallelograms.
A prism is named for the shape of its base.
Cylinders
Has two congruent, parallel bases, but bases of a cylinder are always circular.
Pyramids
Has one polygon shaped base, and the other faces are triangles that come to a point.
A pyramid is named for the shape of its base.
Cones
Has a circular base and a curved surface that comes to a point.
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