acb=180-108
= 72
bac= 180-(36+72)
bac= 180-108
bac= 72°
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acb=180-108
= 72
bac= 180-(36+72)
bac= 180-108
bac= 72°
< ABC = 36
< BCD = 108
ditanya besar < BAC ?
langkah-langkah penyelesaian :
~ mencari dulu besar <ACB dengan
<ACB = 180 - <BCD
<ACB = 180 - 108
<ACB = 72
~ mencari besar <BAC
<BAC = 180 - ( <ABC + <ACB )
<BAC = 180 - ( 36 + 72 )
<BAC = 180 - 108
<BAC = 72
===============================
opsi jawaban = C. 72
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