frankie22
frankie22
16-04-2017
Mathematics
contestada
CONFUSED PLEASE HELP
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Schooltired
Schooltired
16-04-2017
A1=whole circle
A2=not shaded circle
R=20.1+13.2
r=32.3
a1=32.3x3.14
a1=101.422
a2=20.1x3.14
a2=63.114
shaded circle=101.422-63.144
shaded circle=38.278
Answer is 38.278 in2
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qt2011
qt2011
16-04-2017
area of shaded = area of big circle - area of little circle
area of circle = (3.14 r^2)
radius little =20.1
radius big = 20.1+13.2=33.3
area little =3.14×20.1^2=1268.59
area big = 3.14×33.3^2=3481.9146
3481.9146 - 1268.59 = 2213.3246 m^2
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