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KL // MN = 180°
K + N = 180°
(2x-7) + (3x-12) = 180°
2x + 3x = 180 - 7 - 12
5x = 161
x = 32,2°
K = 2x-7
= 2.32,2-7
= 57,4°
N // L = 3x-12
= 3.32,2-12
= 84,6°
*maaf kalo salah