kak ini di bantu juga yah

• 25
Dagang = 100%-(40%+30%+10%) = 20%
maka,
30% × 600 = 120 orang

• 26
4c + 120° = 180°
4c = 60°
c = 15°
..
2a + 100° = 180°
2a = 80°
a = 40°
..
2a+b+4c = 180°
80°+b+60° = 180°
b = 180°-140°
b = 40°
..
maka, a+b+c = 40°+40°+15° = 95°

• 27
Perhatika gambar! Kedua sudut tsb saling berpelurus.. Maka,
2x-60° + 4x-30° = 180°
6x-90° = 180°
6x = 270°
x = 45°

• 28
L.seluruh = L.tdk diarsir + L.daerah arsir
L.ABCD+L.EFGH = 162 + L.daerah arsir
12×12 + 6×15 = 162 + L.daerah arsir
L.daerah arsir = 144+90-162
L.daerah arsir = 72 cm²