Pecandemy

Expressions, equations, and relationships

6.8(B)

Cutting Shapes to Find Area

Model area formulas for parallelograms, trapezoids, and triangles by decomposing and rearranging parts of these shapes.

Part of The student applies mathematical process standards to use geometry to represent relationships and solve problems

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Intro

Fabric for Flags

Picture pennant flags over a Texas football field: slanted rectangles, triangles, and cut-off trapezoid shapes. To find how much fabric each uses, you decompose it, meaning cut it into smaller parts, then rearrange those parts into a shape you already know, like a rectangle.

Triangle Angles and Side Lengths37 of 59Writing Equations for Area and Volume