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Published byGyles Wilcox Modified over 9 years ago

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Objectives Students will be able to apply perimeter, area, and circumference formulas to solve problem.

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**The perimeter P of a plane figure is the sum of the side lengths of the figure.**

The area A of a plane figure is the number of non-overlapping square units of a given size that exactly cover the figure.

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**Area is expressed in square units, such as square centimeters (cm2).**

Perimeter is expressed in linear units, such as inches (in.) or meters (m). Area is expressed in square units, such as square centimeters (cm2). Remember!

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**The base b can be any side of a triangle.**

The height h is a segment forms a right angle with the base. The height may be a side of the triangle or in the interior or the exterior of the triangle.

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**What’s my base and what’s my height?**

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**Perimeter and Area with Algebra**

Find the area and perimeter of each figure. 1. 2. x2 + 4x; 4x + 8 10x; 4x + 16

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**The circumference of a circle is the distance around the circle.**

“perimeter of the circle”

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** (Pi) is often approximated as 3.14 or .**

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**Find circumference and area of circles**

Find the area and perimeter of each circle. 1. 2.

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**Find Circumference and Areas of Circles**

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**Find Circumference and Areas of Circles**

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1.5 HW answer 1. 12 ft 2. 6 ft2 ft or ft 4. P 9.6 m; A 5.76 m2 5. P 2x 20; A 7x 21 6. circumference 7. C 44 mi; A 154 mi2 in. m mm

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**Apply Formulas of Perimeter, Circumference and Areas**

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**Apply Formulas of Perimeter, Circumference and Areas**

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**Group wprk- Application in Real LIfe**

A landscaper is installing a brick patio in the backyard. He is building a rock wall around the perimeter of the patio. 1. What is the area needed for the brick patio? 2. What is the perimeter needed for building the brick wall? 28.56ft.

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