Ubahlah ke dalam bentuk radian 1. 30 derajat 2. 45 derajat 3. 60 derajat 4. 90 derajat 5. 120 derajat 6. 135 derajat 7. 150 derajat

1.30/180×Π=1/6Π radian
2.45/180×Π=1/4Πradian
3.60/180×Π=1/3Πradian
4.90/180×Π=1/2Πradian
5.120/180×Π=2/3Πradian
6.135/180×Π=3/4Πradian
7.150/180×Π=5/6Πradian

30° = 1per6 phi rad
45° = 1per4 phi rad
60° = 1per3 phi rad
90° = 1per2phi rad
120° = 2per3 phi rad
135° = 5per4 phi rad
150° = 15per18 phi rad