Penjelasan dengan langkah-langkah:
Besar sudut pelurus adalah : 180°
Nilai x
3x +2x+30° = 180°
5x = 180° - 30°
5x = 150°
x = 150/5
x = 30°
Besar sudut ABD
= 30° + 3x
= 30 + (3 . 30)
= 30° + 90°
= 120°
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Penjelasan dengan langkah-langkah:
Besar sudut pelurus adalah : 180°
Nilai x
3x +2x+30° = 180°
5x = 180° - 30°
5x = 150°
x = 150/5
x = 30°
Besar sudut ABD
= 30° + 3x
= 30 + (3 . 30)
= 30° + 90°
= 120°