wyznacz promien okregu wpisanego w trójkąt równoboczny o polu 36√3cm²
P = 36√3cm²
P = (a²√3)/4
36√3 = (a²√3)/4 /*4
144√3 = a²√3 /:√3
a² = 144
a - 12
h = (a√3)/2
r = 1/3h
r = 1/3 [(4√3)/2]
r = (4√3)/6 cm
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P = 36√3cm²
P = (a²√3)/4
36√3 = (a²√3)/4 /*4
144√3 = a²√3 /:√3
a² = 144
a - 12
h = (a√3)/2
r = 1/3h
r = 1/3 [(4√3)/2]
r = (4√3)/6 cm