Cara kerjanya full ya 10 poin

kelas 1 =40/180 x 360° =40x2°= 80°
kelas 2=32/180x 360° =32x 2°=64°
kelas 3=36/180 x 360°=36 x2° =72°
kelas 4=34/180 x 360°=34 x 2°=68°
kelas 5=38/180 x 360° =38x2° =76°
Jawaban A