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H=12
V=1/3a^2*H=1/3*6^2*12=144cm^2
hb=V[H^2+(a/2)^2]=V[12^2+3^2]=V153=3V17
Ppb=4*1/2a*hb=2*6*3V17=36V17 cm^3
b=V[hb^2+(a/2)^2]=V[(3V17)^2+3^2]=V[153+9]=V162=9V2
d=aV2=6V2
tg=H/(d/2)=12/3V2=4/V2=4V2/2=2V2
H=12cm
3²+12²=x²
9+144=x²
153=x² / √
x=√153
v=1/3 Pp* H
v=1/3* 32* 12
v=* * 12
v=10*12
v= 120 cm³
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