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Unit 4: Shapes and Space

Unit 4: Shapes and Space. Ms Cormier April 23 rd , 2010. Vocabulary/ Definitions. Polygon : a closed shape made up of line segments Ex. Triangles, rectangles Polyhedron : an object that the faces are polygons Net : a pattern that can be folded to make an object.

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Unit 4: Shapes and Space

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  1. Unit 4: Shapes and Space Ms Cormier April 23rd, 2010

  2. Vocabulary/ Definitions • Polygon: a closed shape made up of line segments Ex. Triangles, rectangles • Polyhedron: an object that the faces are polygons • Net: a pattern that can be folded to make an object. • Regular prism: has regular polygons as bases that are parallel to each other, the other faces are rectangular. • Regular pyramid: has a regular polygon as a base, and triangles for the faces. • Regular dodecagon: is a polygon with 12 equal sides and equal angles.

  3. Outcomes/ Goals for this unit: • 4.1- 4.2 Trace or draw a net for a polyhedron. • 4.3, 4.4, 4.7 Find the total surface area of a polyhedron. • 4.5, 4.6, 4.8 Develop and apply formulas to find the volume.

  4. Basic shapes • Basic shapes are used to form polyhedrons. Rectangle Circle Square Polygons Triangle

  5. Names of other polygons Heptagon 7 sides Pentagon 5 sides Hexagon 6 sides Octagon Decagon 10 sides Dodecagon 12 sides

  6. Rectangular prism • 4 faces are rectangles • 2 bases are squares or smaller rectangles

  7. Pyramids and their bases -Pyramids are named by the bases they have. Ex: A rectangular pyramid has a rectangle for a base. What would be the name of the bases of these other pyramids? How many sides does each of these bases have?

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