Beserta cara.a ya soal.a mw dikumpulkan besok

L segitiga ABC = 6 cm^2
r = 1 cm
AB = 3 cm
BC = 4 cm
R = ....?

r = L/s
1 = 6/s
s = 6/1
s = 6 cm

L^2 = s(s-AB)(s-BC)(s-AC)
6^2 = 6(6-3)(6-4)(6-AC)
36 = 6(3)(2)(6-AC)
36 = 36(6-AC)
6 - AC = 36/36
6 - AC = 1
AC = 6 - 1
AC = 5

R = [AB×BC×AC]/4L
R = [3×4×5]/4(6)
R = 60/24
R = 2,5 cm (A)