kak tolong jawab donk aku kebingungan siapa tau yg jawab dapet pahala^___^

12)
3x + 2x+15 + 4x-33 = 180°
9x - 18 = 180
9 x = 180 + 18
9 x = 198
x = 198 ÷ 9
x = 22

Bsar sudut sudutnya =
3x = 3×22 = 66°
2x+15 = 2×22 + 15 = 44+15 = 59°
4x-33 = 4×22 - 33 = 88-33 = 55°
Jawabannya A.

14)
Luas = 135 cm²

a × t ÷ 2 = 135
18 × t = 135 × 2
18 × t = 270
tinggi = 270 ÷ 18
tinggi = 15 cm

Semoga bermanfaat ^_^