Open the Nets & Surface Area module. Set the solid and its dimensions, look at the flat net, then use the Fold slider. The Faces list adds up the areas.
Name: Date:
Part A: Faces and nets
1.How many faces does a cube have? Count the pieces in its net.1 pt
4
6
8
12
2.Set the solid to Cube with side 3. What is the area of one square face?1 pt
Answer:
3.A net is made of flat pieces, one per face. What pieces make a net for a rectangular prism?1 pt
6 rectangles
4 rectangles and 2 triangles
6 triangles
3 rectangles
4.What pieces make a net for a triangular prism?1 pt
5 rectangles
2 triangles and 3 rectangles
3 triangles and 2 rectangles
6 triangles
Part B: Surface area
5.Set the solid to Cube with side 4. What is its surface area?1 pt
Answer:
6.Set the rectangular prism to 5 × 3 × 2. What is its surface area?1 pt
Answer:
7.Set the rectangular prism to 4 × 3 × 2. What is its surface area?1 pt
Answer:
8.Set the triangular prism to legs 3 and 4, length 5. What is its surface area?1 pt
Answer:
9.Set the cube to side 5. What is its surface area?1 pt
Answer:
Part C: Reasoning
10.A cube has a surface area of 54 square units. What is its side length? (Its net is 6 equal squares.)2 pts
11.Explain why the surface area of a solid is the sum of the areas of the pieces in its net.2 pts