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Online Quiz (Worksheet A B C D)

Questions Per Quiz = 2 4 6 8 10

Grade 5 - Mathematics
10.5 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: A polyhedron must be made up of the same shaped face.

Q 2: A rotation is the same as a flip.

Q 3: If a tetrahedron has a base of 8 in. and a height of 7.5 in., what would be the surface area of one of its sides? (hint: A= b X H divide by 2)
60 square inches
140 square inches
30 square inches
200 square inches

Q 4: What is another name for a vertex?

Q 5: An irregular polyhedron is a polyhedron with two or more different shaped faces.

Q 6: What kind of face shape does the octahedron have?

Q 7: What are the shapes of the faces in a Dodecahedron?

Q 8: A slide is the same as a translation.

Question 9: This question is available to subscribers only!

Question 10: This question is available to subscribers only!

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