bombshell925
bombshell925
18-05-2016
Mathematics
contestada
Please help!
Thank you in advance : )
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apologiabiology
apologiabiology
18-05-2016
first one
we see that since both traignels are having right angles, and same corner angle (BAC) their sides are proportional
we notice that CB=AB so therefor
ED=DA
12=12
but wait, x=AD-AB=12-2=10
x=10
circumference=2pir
2pi=2pir
divide both sides by 2pi
1=r
nice
area=pir^2
area=pi1^2
area=pi1
aera=pi
area=pi units or 3.14 unts
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