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Grade 3 - Mathematics
8.14 Regular Polyhedrons

A prism is a three dimensional figure with two same, parallel bases that are polygons.
  • A 3 dimensional shape with all equal faces is called a polyhedron.
  • A polyhedron having four faces is called tetrahedron.
  • Polyhedrons are named after the number of faces they have.
  • They are prefixed as tetra-4, penta-5, hexa -6, hepta- 7, octa-8, nona -9, deca- 10, 12-dodeca, 20-icosa.
Directions: Answer the following questions. Also draw at least five examples of regular polyhedrons of your own.
Q 1: What is the shape with 20 faces, each formed by an equilateral triangle?

icosahedron
twentyhedron
hydron

 Q 2: What is the shape with 12 faces, each formed by an regular pentagon?

docahedron
12hedrons
dodecahedron

Q 3: What is the shape with 6 faces, each formed by a square?

rectangle
square
cube

 Q 4: What is the shape with 8 faces, each formed by an equilateral triangle?

pentahedron
octahedron
hexahedron

Question 5: This question is available to subscribers only!

 Question 6: This question is available to subscribers only!


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