mohon bantuannya mtk kelas X 1.a 2. a dan b!

jawab
 satuan sudut

1. 
a. 2/9 putaran = 2/9 x 360° = 80° = 4/9 π rad = 4/9(3,14) rad = 1,39 rad
b. 7/4 putaran = 7/4 x 360 = 630° = 7/2 π rad = 7/2(3,14) rad = 10,99 rad

2.
a.  5/12 π rad =  5/12 x 180°= 75°
b. 5/6 π rad = 5/6 x 180° = 150°