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P=ah\2
8√3=4√3 h\2
8√3=2√3 h /√3
8=2h /2
h=4
(4√3)² +4² =c²
48+16=c²
64 =c² /√
c=√64
c=8
P= 1/2 a*h
8√3=1/2*4√3 *h
8√3=2√3*h
h=8√3:2√3
h=4
z twierdzenia Pitagorasa
a²+b²=c²
(4√3)²+4²=c²
48+16=c²
c²=64
c=√64
c=8 -odp A