besar sudut k adalah

KLM = 180- 112 = 68°
LMK = KLM = 68°

K = 180° - KLM - LKM = 180° -68°-68° = 112-68 = 44°

<L = 180 - 112 = 68
<L = <M = Segitiga sama kaki = 68
180 = <K + <L + <M
<K = 180 - (68 + 68)
<K = 180 - 136
      = 44 B