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jumlah sudut segitiga = 180
jml perbandingan = 1 + 2 + 3 = 6
perbandingan terbesar = 3
2. Δsama sisi = 3 sisinya/sudutnya sama besar
salah satu sudutnya = 180 : 3 = 60 derajat
sudut luas segitiga = 180 - 60 = 120 derajat.
3. sudut terbesar = 3/6 x 180 = 90 derajat
<C = 180 - <A - <B = 180 - 90 - 60 = 30 derajat