kak tolong jawab in pake caranya yaaa
Jawaban:
C. 75°
Penjelasan dengan langkah-langkah:
4x +5x + 45 = 180
9x = 180 - 45
9x = 135
x = 135 : 9
x = 15°
4x = 4 x 15
= 60°
RQS + 45° + 60° = 180°
RQS + 105° = 180°
RQS = 180° - 105°
RQS = 75°
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