A drawing of the base of my house is below. I want to plant flowers around my entire house. How would I go about finding out how many flowers I need? (Each.

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Presentation transcript:

A drawing of the base of my house is below. I want to plant flowers around my entire house. How would I go about finding out how many flowers I need? (Each flower covers about 2 ft. from left to right).

LEQ: How do we estimate area, perimeter, or circumference of an irregular figure?

 Perimeter: The sum of the side lengths of a polygon  Area: The number of square units enclosed by a polygon  What is a square unit?

 Perimeter= 4s (s=side length)  Area=s 2

 Perimeter= 2L+2W  Area=L(W)

 Circumference= 2  r, r=radius ◦ Or D , D=diameter, why?  Area=πr 2

 Postulate 1-9: ◦ If 2 figures are congruent, then their areas are equal  Postulate 1-10: ◦ The area of a region is the sum of the areas of its nonoverlapping parts.

A carpeting specialist has to lay carpet in the room below. How many square ft. of carpet will he need? Ft.

 A circle has an area of 144 . What is the diameter?  If a rectangle has a perimeter of 24 cm. and a length of 5 cm., what is the width?

p. 56: 1-12, p. 65: 8, 11, 26,37,38