Jawabanmu

2014-05-08T19:06:49+07:00
R=LΔ÷1/2kel.Δ
20+20+24×1/2=32
LΔ=√32(32-20)(32-20)(32-24)
    =√32(12)(12)(8)
    =√36864=192
r=192/32=6