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NNnn1fff
@NNnn1fff
October 2021
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sedinalana
Verified answer
1
AB(7-3;5-(-2))=(4;7)
MN(2-(-5);-4-7)=(7;-11)
AB*MN=4*7 +7*(-11)=28-77=-49
Ответ 1
2
L1=π*5*30/180-5π/6
L2=π*1*120/180=2π/3
L1/L2=5π/6:2π/3=5π/6*3/2π=5/4=1 1/4
Ответ 2
3
S(Δ)=1/2*10²*sin60=50*√3/2=25√3
R=10√3/6
Sкр=π*300/36=25π/3
S=S(Δ)-Sкр=25√3-25π/3=(75√3-25π)/3=25*(√3-π/3)
4
Значит H(2:-1)-середина отрезка А1А
x1=2*2-3=1
y1=-1*2-3=-5
A1(1;-5)
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Answers & Comments
Verified answer
1AB(7-3;5-(-2))=(4;7)
MN(2-(-5);-4-7)=(7;-11)
AB*MN=4*7 +7*(-11)=28-77=-49
Ответ 1
2
L1=π*5*30/180-5π/6
L2=π*1*120/180=2π/3
L1/L2=5π/6:2π/3=5π/6*3/2π=5/4=1 1/4
Ответ 2
3
S(Δ)=1/2*10²*sin60=50*√3/2=25√3
R=10√3/6
Sкр=π*300/36=25π/3
S=S(Δ)-Sкр=25√3-25π/3=(75√3-25π)/3=25*(√3-π/3)
4
Значит H(2:-1)-середина отрезка А1А
x1=2*2-3=1
y1=-1*2-3=-5
A1(1;-5)