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= 27'
B. <DOE = 63'
C. <EOF = 27'
D. <AOF = 90'
E. <BOF = 90' + 63'
= 153'
b. 63 ( bertolak belakang BOA )
c. 90 - 63 = 27
d. 90 ( siku2)
e. 90 + 63 = 153