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Penjelasan dengan langkah-langkah:
Mencari keliling
k = 7 + 12 + (3 + 3x) + (2x + 6)
= 28 + 5x
mencari nilai x
= 28 + 5x
-5x = 28
-x = 28/-5
-x = -5,6
x = 5,6
Panjang sisi KM
= 3 + 3x
= 3 + (3.(5,6))
= 3 + (16,8)
= 19,8
Panjang KP
= 2x + 6
= (2.(5,6)) + 6
= (11,2) + 6
= 17,2