180 = 102 + 3y
3y = 180 - 102
3y = 78
y = 78/3
y = 26 (a)
<A1 = <B1 = < A3 = <B3
<A4 = <B4 = <A2 = <B2
Jadi, sudut yang tidak sama besar adalah D. <A3 dan <B4
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Nomor 1 :
180 = 102 + 3y
3y = 180 - 102
3y = 78
y = 78/3
y = 26 (a)
Nomor 2 :
<A1 = <B1 = < A3 = <B3
<A4 = <B4 = <A2 = <B2
Jadi, sudut yang tidak sama besar adalah D. <A3 dan <B4