Representing Solids
I.SectionObjectives
- Identify isometric, orthographic, cross- sectional views of solids.
- Draw isometric, orthographic, cross- sectional views of solids.
- Identify, draw and construct nets for solids.
II.Cross-curricular-DesignsofPolyhedrons
- This is also theTechnologyIntegration section because this activity depends on the technology.
- Use the following website for nets of polyhedrons. This website also contains different patterns for many
different polyhedrons. - http://www.korthalsaltes.com/
- The patterns can be downloaded in pdf form and printed.
- Students will require access to a computer and printer.
- Have each student select two different polyhedrons to work with.
- After printing out the pattern, have the student create/build a model of each solid.
- Then each student is to draw orthographic, cross- sectional views of each solid.
- Students need to be sure that their work is complete and that the solid is correctly represented.
- Then have the students create their own model of a third solid.
- For this one, they can’t use the already created patterns.
- They must create their own model using what they have already learned.
- When finished, allow time for students to share their work.
IV.NotesonAssessment
- Begin by observing students as they work.
- Do the students understand the difference between the different views of the solid?
- Did the students successfully create each model?
- Is the orthographic, cross- sectional view of each solid accurate?
- Provide students with feedback on their work.
Prisms
I.SectionObjectives
- Use nets to represent prisms.
- Find the surface area of a prism.
- Find the volume of a prism.
II.Cross-curricular-PrismCollage
- Have students use magazines to find pictures of different prisms.
- For example, a triangular prism could be piece of pie, a rectangular prism could be a box, etc.
- Students will need scissors, magazines of all kinds, glue and large posterboard.
- Have students identify the prisms in their collage.
- When finished, allow time for the students to share their work.
3.11. Surface Area and Volume