bantu no 1 ya pake caranya..

<KLO = <MNO
<KOL = 90°

<LKO + <KLO + <KOL = 180°
<LKO + <KLO + 90 = 180
<LKO + <KLO = 90

<LKO : <KLO = 2 : 3

<LKO = 2x
<KLO = 3x

<LKO + <KLO = 2x + 3x = 5x = 90
x = 90/5 = 18

<KLO = 3x = 3 × 18 = 54
<KLM = 2×<KLO = 2 × 54 = 108°