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A drawing of the base of my house is below. I want to plant flowers around my entire house. How...
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Transcript of A drawing of the base of my house is below. I want to plant flowers around my entire house. How...
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).
Warmup:
Section 1.9: Perimeter,
Circumference, and Area
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=s2
Square
Perimeter= 2L+2W
Area=L(W)
Rectangle
Circumference= 2r, r=radius◦ Or D, D=diameter, why?
Area=πr2
Circle
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, 32-40
p. 65: 8, 11, 26,37,38
Homework (2 assignments)