V=88200/17см³
Sбок=29400/17см²
Объяснение:
S(∆ABC)=√((p(p-AB)(p-BC)(p-AC))
p=(AB+BC+AC)/2=(17+25+28)/2=35см
S(∆ABC)=√(35*(35-17)(35-25)(35-28))=
=√(35*18*10*7)=√(5*7*2*3*3*2*5*7)=
=5*7*2*3=210см².
S(∆ABC)=1/2*h*BC →
h=2*S(∆ABC)/BC=2*210/17=420/17=
=24цел12/17
h=AA1
V=S(∆ABC)*AA1=420/17*210=88200/17 см³
Sбок=Росн*АА1=(17+25+28)*420/17=
=70*420/17=29400/17см²
V=88200/17см³
Sбок=29400/17см²
Объяснение:
S(∆ABC)=√((p(p-AB)(p-BC)(p-AC))
p=(AB+BC+AC)/2=(17+25+28)/2=35см
S(∆ABC)=√(35*(35-17)(35-25)(35-28))=
=√(35*18*10*7)=√(5*7*2*3*3*2*5*7)=
=5*7*2*3=210см².
S(∆ABC)=1/2*h*BC →
h=2*S(∆ABC)/BC=2*210/17=420/17=
=24цел12/17
h=AA1
V=S(∆ABC)*AA1=420/17*210=88200/17 см³
Sбок=Росн*АА1=(17+25+28)*420/17=
=70*420/17=29400/17см²