Jawabanmu

2014-03-23T21:09:11+07:00
Dik : a = 7 cm
        b = 25 cm
        c = √25²-7² = √625-49 = √576 = 24
        LΔ = 1/2.a.t = 1/2.7.24 = 7.12 = 84 cm²
dit : rl = ... cm
jwb : a.b.c/4LΔ = 7.25.24/4(84) = 12,5 cm
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