Page 18 - MODUL LINGKARAN

Maka,
1 1
∠BCD =
180 – ((180 – busur AE) + busur BD )
2 2
1 1
= 180 – 180 + busur AE – busur BD
2 2
1 1
= busur AE – busur BD
2 2
1
= ( busur AE – busur BD )
2
Jadi,
1
∠BCD = ( busur AE – busur BD )
2

oleh. deddy suharja@page 17 of 36