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< K = < L
x = 70⁰
< L dan < M merupakan sudut dalam berseberangan, jumlahnya 180⁰
< L + < M = 180⁰
70⁰ + y = 180⁰
y = 180⁰ - 70⁰
y = 110⁰
Luas trapesium = 1/2 x jumlah sisi sejajar x tinggi trapesium
= 1/2 x (KL + NM) x tinggi