Berpelurus.
Sudut C = x.
x + 145° = 180°
x = 180° - 145°
x = 35°.
2x + 3x + 35° = 180°
5x = 180° - 35°
5x = 145°
x = 145/5 = 29°.
Sudut ABC = 3(x) = 3 x 29 = 87°
Penjelasan dengan langkah-langkah:
penjelasannya ada di dilampiran
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Berpelurus.
Sudut C = x.
x + 145° = 180°
x = 180° - 145°
x = 35°.
2x + 3x + 35° = 180°
5x = 180° - 35°
5x = 145°
x = 145/5 = 29°.
Sudut ABC = 3(x) = 3 x 29 = 87°
Penjelasan dengan langkah-langkah:
penjelasannya ada di dilampiran