2 PERIMETER OF A SQUARE P= 4s Perimeter equals four times the length of one side
3 AREA OF ASQUAREA=s2Area of a square equals the length of one side squared (times itself)
4 3 in.Area of a SquareA=s²A= 3 in. * 3 in.A=9 sq. in.3 in.Perimeter of a SquareP=4sP=4(3 in.)P=12 in.
5 PERIMETER OF A RECTANGLE P=2l+2w Perimeter of a rectangle equals 2 times the length plus 2 times the width
6 AREA OF ARECTANGLEA=lwArea of a rectangle equals length times width
7 Perimeter of a Rectangle P=2l+2wP=2(3 in.) + 2 (2in.)P=6 in. + 4 in.P=10 in.3 in.2 in.Area of a RectangleA=lwA=3 in.(2 in.)A=6sq. in.
8 Find the perimeter and area of each figure. Find the perimeter and area of each figure. Show all work!4 cm2.5 cmsquare8 in.11 in.5 in.7 in.4 in.4 in.
9 Now let’s try it when the measurement needs to change. 12 in.12 in.We need the area in square feet.There are 2 methods1. Convert first.2. Convert after you have the area
10 Convert first.12 inches = 1 ftMultiply 1 times 1Area is 1 square foot.12”12 in.
11 Convert 2nd.12”12 times 12 = 144 square inches.12”How many square inches are in a square foot?How man inches across the top?How many across the side?If we draw all of the boxes there will be 144 sq. inches in 1 square ft.We have divide square inches by 144 to get square feet!
12 24 in.What is the area in square feet?18 inches
14 100 cm.250 cm.Find area in square meters.Hints:100 cm = 1 meter10,000 sq cm = 1 sq meter
15 Homework: problems below Find the perimeter and area both in feet and yards for a rectangle with a length of 15 feet and a width of 9 feet.Find the perimeter & area of a square that has a side of 24 inches. Give your answer in both inches and feet.Find the perimeter and area of the following figure.12 in.9 in.12 in.Don’t forget to show all work!6 in.