Area of Composite Figures

Lesson Objective

Demonstration of

Learning

(7.9 C) I will be able to determine the area
of composite figures containing
combinations of rectangles,squares,
parallelograms and trapezoids.

Area of Composite Figures

Given 4 problems, I will be able to
determine the area of composite figures
containing combinations of rectangles,
squares, parallelograms and trapezoids 4/4
times or with 100% accuracy.

How do you find the area of composite figures?

Essential Question

Academic Vocabulary

Area

Triangle

Rectangle

Parallelogram

Circle

Composite

Formula Chart

Finding the Area of Composite Figures

We Do

Find the area of the composite figure.

1. Find the area of the square.

2. Find the area of the trapezoid.

Find the area of the composite figure.

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A banquet room is being carpeted. A floor plan of the room is shown at right. Each unit represents 1 yard. The carpet costs $23.50 per square yard. How much will it cost to carpet the room?

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Let's try another one!

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Multiple Choice

An advertising banner has four sections, as modeled below. Two sections are congruent trapezoids and two sections are congruent right triangles.

Which measurement is the best estimate of the area of the banner in square meters?

• 3.375 m²

• 6.75 m²

• 14.00 m²

• 20.75 m²