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S=I/2 (35+I2+37)
= I/2(84)
= 42
lalu cri L nya
L=√s(s-a)(s-b)(s-c)
= √42(42-35)(42-I2)(42-37)
=√42(7)(30)(5)
=√44I00=…
rumus rd= L/S=…
jdi angkany tinggal dimsukin aj