2. Tentukan ukoran sudut berikut dalam tentu derajat
[tex] a.\frac{5}{9} \pi \: rad[/tex]
[tex] b .2 \frac{1}{2} \pi \: rad[/tex]
[tex] a.\frac{5}{9} \pi \: rad[/tex]
[tex] b .2 \frac{1}{2} \pi \: rad[/tex]
» Jawaban
a. [tex]\displaystyle\tt{\color{black}{\frac{5}{9}×180°=100°}}[/tex]
b. [tex]\displaystyle\tt{\color{black}{2\frac{1}{2}×180°}}[/tex]
[tex]\displaystyle\tt{\color{black}{\frac{5}{2}×180°=450°}}[/tex]
» Penjelasan
satuan sudut
• derajat ( . . . ° )
satu derajat = 1°
1° = 60 menit > 1° = 60'
1' = 60 detik > 1' = 60"
1' = 3.600 "
• radian (rad)
[tex]\displaystyle\tt{\color{black}{1πradian}}[/tex] = 180°
[tex]\displaystyle\tt{\color{black}{"π"}}[/tex] phi = 3,14 atau 22/7
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