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GeometryContents

Lesson 1 Area of a Parallelogram . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

Objective: Compare the areas of parallelograms and rectangles.

Manipulative: Geoboards

Lesson 2 Constant Perimeter and Changing Area . . . . . . . . . . . . . . 94

Objective: Observe and generalize about the area enclosed within a constant perimeter.

Manipulative: AngLegs®

Lesson 3 Area of a Triangle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98

Objective: Compare the areas of triangles and parallelograms.

Manipulative: Geoboards

Lesson 4 Area of Trapezoids . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102

Objective: Determine the area of a trapezoid by dividing it into two triangles whose heights are the same as the height of the trapezoid and whose bases are those of the trapezoid.

Manipulative: XY Coordinate Pegboard

Lesson 5 Shapes in the Coordinate Plane . . . . . . . . . . . . . . . . . . . . 106

Objective: Draw shapes on a coordinate grid and describe their properties.

Manipulative: AngLegs®

Lesson 6 Nets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110

Objective: Explore nets.

Manipulative: Relational GeoSolids®

Lesson 7 Surface Area of a Rectangular Solid . . . . . . . . . . . . . . . . . 114

Objective: Find the surface area of a rectangular solid.

Manipulative: Snap Cubes®