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Posted by :
Alwi Fauzi
Thursday, March 17, 2011
Detik (“)
Menit (‘) = 60 detik
Derajat (°) = 60 menit
Sudut Siku-Siku = 90°
Sudut Lurus = 180°
Lingkaran = 360°
1 Putaran Penuh = 1 keliling lingkaran = 360°
½ putaran penuh = ½ keliling lingkaran = 180°
¼ putaran penuh = ¼ keliling lingkaran = 90°
Radian (rad)
1 radian = 180°/π= 57°17’44,8” (dibaca: 57 derajat 17 menit 44,8 detik)
1° = 0,01745329 rad = π/180° rad
30° = 0,52 radian
45° = ¼ radian = 0,785 rad
90° = ½ radian
180° = π = 3,14159265 radian
