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Find the value of each product mentally.
Your teacher will give you a drawing of a polyhedron. You will draw its net and calculate its surface area.
What polyhedron do you have?
Study your polyhedron. Then draw its net on graph paper. Use the side length of a grid square as the unit.
Label each polygon on the net with a name or number.
Find the surface area of your polyhedron. Show your thinking in an organized manner so that it can be followed by others.
Here are the nets of three cardboard boxes that are all rectangular prisms. The boxes will be packed with 1-centimeter cubes. All lengths are in centimeters.
A net can help us find the surface area of a polyhedron that has different polygons for its faces. We can find the areas of all polygons in the net and add them.
A square pyramid has a square and 4 triangles for its faces. Its surface area is the sum of the areas of the square base and the 4 triangular faces:
The surface area of this square pyramid is 96 square units.