Jawaban:
( 2y + 16 ) + ( y + 23 ) = 180°
3y + 39 = 180°
3y = 180 - 39
3y = 141
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Jawaban:
( 2y + 16 ) + ( y + 23 ) = 180°
3y + 39 = 180°
3y = 180 - 39
3y = 141
y = 47°