Find Perimeter, Circumference, and Area Ch 1.7. Formulas.

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Presentation transcript:

Find Perimeter, Circumference, and Area Ch 1.7

Formulas

What is perimeter? The distance around a shape or figure.

What is area? The amount of space inside of a flat shape

What is circumference? The perimeter around a circle

How do you know when to use a specific formula?

Find the perimeter and area.

Page 38 #3, 4, 10, 11

Page m 13 m 3 m x m 4 m

Circumference and Area 3.1 m

Circumference and Area 12 m

Page

Finding area when given perimeter Some problems will give you the area and ask you to find the perimeter or vice versa. You will use both the area and perimeter formulas to solve.

The area of a square is 49, what is its’ perimeter? A = s²

The perimeter of a rectangle is 42. You know that the length is twice the width. What is the area of the rectangle?

The area of a rectangle is 192. You know that the length is 3 times the width. What is the perimeter of the rectangle?