No 12 tolong ya ;)5 poin itu banyak loh XD

By Posted on

No 12 tolong ya ;)5 poin itu banyak loh XD

No 12 tolong ya ;)5 poin itu banyak loh XD

7x° + 5x° = 12x°
12x° = 180°
1x° = 180° : 12x° = 15°
∠ABD = 7x° = 7 x 15° = 105°