dengan cara kerjanya tolong

Mapel : Matematika

Kelas : 7


→ AOD = (2x + 5)°

→ COD = 6x°

→ COB = (5x - 30)°


Ditanya :

→ AOC

jawaban :

→ Sudut Garis lurus = 180°

Maka, tentukan nilai x :

AOD + COD + COB = 180°

2x + 5 + 6x + 5x - 30 = 180°

13x - 25 = 180°

13x = 180° + 25°

13x = 205°

x = 205°/13

x = 15,76 °


Maka :

AOC :

= 2x + 5 + 6x

= 2(15,76) + 5 + 6(15,76)

= 31,53 + 5 + 94,56

= 131,09°