gunakan hukum cosinus.
(8√3)^2 = r^2 + r^2 -2(r)(r)cos 120
192 = 2r^2 + r^2
3r^2 = 192
r^2 = 64
r = 8 cm
semoga membantu :)
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gunakan hukum cosinus.
(8√3)^2 = r^2 + r^2 -2(r)(r)cos 120
192 = 2r^2 + r^2
3r^2 = 192
r^2 = 64
r = 8 cm
semoga membantu :)