Jawaban:
B. 50°
Penjelasan dengan langkah-langkah:
2x + 70 + (x+20) = 180
2x + 70 + x + 20 = 180
3x = 180 - 90
3x = 90
x = 90/3
x = 30
sudut B
= x + 20
= 30 + 20
= 50°
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Verified answer
Jawaban:
B. 50°
Penjelasan dengan langkah-langkah:
2x + 70 + (x+20) = 180
2x + 70 + x + 20 = 180
3x = 180 - 90
3x = 90
x = 90/3
x = 30
sudut B
= x + 20
= 30 + 20
= 50°