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### MEAP Preparation - Grade 7 Mathematics3.11 Geometry - Polyhedrons

 Polyhedron: A solid bounded by plane faces or polygons, especially by more than four is known as polyhedredron. The plane faces or polygons are also called faces. Type of Solids: A regular polyhedron has similar shaped faces. An irregular polyhedron has different shaped faces. The 5 regular polyhedra are: Cube has 6 square faces. Regular tetrahedron has 4 triangular faces. Regular octahedron has 8 triangular faces. Regular dodecahedron has 12 pentagonal faces. Regular icosahedron has 20 triangular faces. Example: What is the shape of face in a tetrahedron? Answer: Triangle Directions: Answer the following questions. Draw at least 5 polyhedrons on a sheet of paper.
 Q 1: An irregular polyhedron is a polyhedron with two or more different shaped faces.FalseTrue Q 2: What are the shapes of the faces in a Dodecahedron?HexagonTrianglePentagonSquare Q 3: What is another name for a vertex?pointarraycorner Q 4: A slide is the same as a translation.FalseTrue Q 5: Using the shape spinner tell how many faces a Octahedron has.891210 Q 6: Using the shape spinner tell how many faces a Dodecahedron has.2012831 Q 7: What kind of face shape does the octahedron have?octagonsquaretrianglehexagon Q 8: A polyhedron must be made up of the same shaped face.FalseTrue Question 9: This question is available to subscribers only! Question 10: This question is available to subscribers only!