SiskaAshamisal : perbandingan panjang busur AB dan OA = 22:5, yang ditanyakan berapa sudut reflek AOB jawab
OA = jari-jari ? r = 5 K = 2πr ...= 2 x 22/7 x 5 K = 220/7 Sudut AOB = 22/(220/7) x 360 ..................= (22 x 7/220) x 360 .................. = 7/10 x 360 .................. = 252° Sudut refleks AOB = 360 - 252 ............................= 108°
jawab
OA = jari-jari ?
r = 5
K = 2πr ...= 2 x 22/7 x 5
K = 220/7
Sudut AOB = 22/(220/7) x 360
..................= (22 x 7/220) x 360
..................
= 7/10 x 360 ..................
= 252° Sudut refleks AOB = 360 - 252
............................= 108°