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Learning resources brought to you by Tucson Unified's Curriculum and Instruction

We've provided a rich selection of free, fun online learning sources in English language arts (ELA), math, science, and visual arts to supplement your learning. These are organized by grade level. Click the grade level for your child to get started!

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How to Use This Page

This page contains a "menu" of lessons and activities for this week. You will find the objectives: the specific skills that you work on. Then you will find a selection of lessons and activities which help you practice and master those skills. If you run into technical issues or other difficulties with any of these, simply move on and choose another.

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Geometry - Week Six

Printable Version of this lesson board in PDF format

High School Geometry

Week 6 May 11-May 15

Weekly Packet

Math Objectives: Students will be able to:

  • apply the skills and mathematical principles learned over the last 5 weeks to create a polyhedron and calculate its surface area.

Instructional Videos

Definition of Polyhedron

Using Origami to Create Polyhedra
8 base pieces
12 base pieces
30 base pieces
270 base pieces

Explanation Websites

Platonic Solids – Math is Fun provides nets for the platonic solids only.
Math Craft Polyhedra: Step-by-step instructions with pictures on how to assemble paper polyhedra by folding nets.
Polyhedra Models: Many models to choose from, select the picture to get the net and instructions on how to assemble.
Pinterest: More inspiration, if needed.

Project

Pick a semi regular Polyhedron to make from these pictures: Archimedean Solids
Then find the net or layout to create the solid from these: Polyhedra Nets
Build your polyhedron, send a selfie with it to your teacher
Find the surface area of your polyhedron by measuring and find the area of each side and adding them all up.

Activities/Projects/Extensions
Create your own Cube from Pyramids

  1. Video of Pyramids that Make a Cube
  2. Create your own cube by making three Pyramids: Pyramid Net
  3. Upload Selfie with your pyramids.
  4. Here are nets for some of the other pyramid types shown in the video. Square Pyramid, Triangular Pyramid

Key Vocabulary / Formulas/ Things to Remember

Polyhedron - A polyhedron is a 3-dimensional solid made by joining together polygons. These structures are named and defined by the number of faces it has.
Net of a solid – The connected two-dimensional shapes that would fold to create the exterior of a three dimensional solid.
Surface Area – the sum of the areas of each surface of a three dimensional solid.

Platonic Solid - one of the five regular polyhedrons: tetrahedron, octahedron, hexahedron, icosahedron, or dodecahedron.
Archimedean Solid - A polyhedron whose faces are regular polygons and whose angles are all congruent. The faces may all be of the same type, in which case the solid is a regular polyhedron, or may be of different types. There are only thirteen Archimedean solids.

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