TUESDAY, SEPTEMBER 27
WARM­UP:
THE LENGTH OF A RECTANGLE IS 17CM. THE PERIMETER IS 102 CM. FIND THE WIDTH.
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1.7 FIND PERIMETER, CIRCUMFERENCE, AND AREA
PERIMETER IS THE DISTANCE AROUND A FIGURE. CIRCUMFERENCE IS THE DISTANCE AROUND A CIRCLE AND AREA IS THE AMOUNT OF SURFACE COVERED BY A FIGURE.
PERIMETER AND CIRCUMFERENCE ARE MEASURED IN UNITS OF LENGTH, SUCH AS METERS (m) AND FEET (ft). AREA IS MEASURED IN SQUARE UNITS, SUCH AS SQUARE METERS (m2) AND SQUARE FEET (ft2).
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FORMULAS FOR A SQUARE
P = 4S
A = S2
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RECTANGLE
P = 2L + 2W
A = (L)(W)
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TRIANGLE
P = A + B + C
A = 1/2 BH
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CIRCLE
C = 2 R
A = R2
10 CM
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PAGE 52 # 4 ­ 9
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ASSIGNMENT:
PRACTICE 1.7A # 1 ­ 9
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