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## PowerPoint Slideshow about ' Chapter 10: Area' - sophie

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Objectives:

- To find the area of a parallelogram.
- To find the area of a triangle.

Vocabulary

- Base of a Parallelogram
- Altitude of a Parallelogram
- Height of a Parallelogram
- Base of a Triangle
- Height of a Triangle

Theorem 10-1:“Area of a Rectangle”

- The area of a rectangle is the product of its base and its height.

A = bh

height

base

Theorem 10-2:“Area of a Parallelogram”

- The area of a parallelogram is the product of its base and its height.

A = bh

height

base

Parts of a Parallelogram

- A base of a parallelogram is any of its sides.
- The corresponding altitude is a segment perpendicular to the line containing that base, drawn from the side opposite that base.
- The height is the length of the altitude.

Finding the Area of a Parallelogram

- Find the area of the parallelogram:

Finding the Area of a Parallelogram

- Find the area of the parallelogram:

Theorem 10-3:“Area of a Triangle”

- The area of a triangle is half the product of the base and the corresponding height.

Parts of a Triangle

- A base of a triangle is any of its sides.
- The corresponding height is the length of the altitude to the base.

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