1. Module 5 Lesson 1 The Area of Parallelograms Through Rectangle Facts.notebook
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MODULE 5 Area, Surface Area, and Volume
Problems
Topic A: Area of Triangles, Quadrilaterals, and
Polygons
Lesson 1: The Area of Parallelograms Through
Rectangle Facts
Student Outcomes
§ Students show the area formula for the region bounded by a parallelogram by composing it into rectangles.
They understand that the area of a parallelogram is the area of the region bounded by the parallelogram.

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Classwork
Opening Exercise
Name Each Shape
Right Triangle
Parallelogram
Acute Triangle
Rectangle Trapezoid

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How do we find the area of a rectangle?
How do we find the area of a parallelogram?

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7in
3in
3in
7in
3in
7in
So to find the area of a parallelogram.....

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Exercises
1. Find the area of each parallelogram below. Each figure is not drawn to scale.

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§ How could we construct a rectangle from this parallelogram?
§ Why can't we use the same method we used previously?

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§ Therefore, it does not maer how lted a parallelogram is.
The formula to calculate the area will always be the same as
the area formula of a rectangle.

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1.75in
0.5in

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1.75in
1.25in

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1in
1in

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Closing
Please take out your exit ticket for Lesson 1, close your
binder, and complete the exit ticket. This will be collected.
§ Why are the area formulas for rectangles and parallelograms the same?

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Closing
Please take out your exit ticket for Lesson 9, close your
binder, and complete the exit ticket. This will be collected.

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