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34² = 16²+30²
1156 = 256 + 900
(sama)
Luas segitiga = 1/2 x a x t = 1/2 x 16 x 30 = 240
Jari2 lingkaran luar segitiga:
r = abc/4L
r = (16x30x34)/(4x240)
r = 16320/960
r = 17 cm
K = 2 π r = 2 . 3,14 . 17 = 106,76 cm