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bc =√24^2 + 10^2
bc = √576 + 100
bc = √676
bc = 26
keliling = 24 + 10 + 26 = 60
s = 1/2 . k
s = 1/2 . 60
s = 30
luas = √s(s-a)(s-b)(s-c)
luas =√30.(30-26)(30-24)(30-10)
luas =√30 . 4 . 6 . 20
luas = √14400
luas = 120
jari jari dalam segitiga
r = L / s
r = 120/30
r = 4 cm