 # Lesson 10-6 Solid Figures.

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Lesson 10-6 Solid 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.