tolong dijawab yg no2 please!!

1. 5/9 x 180 = 5 x 20 = 100° ( sudut tumpul )2. 2/5 x 360 = 2 x 72 = 144° ( sudut tumpul )3. 0,2 x 180 = 2/10 x 180 = 2 x 18 = 36° ( Sudut lancip )4. 1 7/8 x 90 = 15/8 x 90 = 135/8 = 16,875° ( Sudut lancip )
semoga membantu :)