Hello,
Note that
But we know that
Hence
Similarly, we have
Thus the sum of the four angles OAD, ODA, OBC and OCB is 2n.
In the figure below, what is the sum, in terms of n, of the degree measure of the four angles marked with question marks (?)
a) n
b)2n
c) 180-n
d) 360-n
e)360-2n
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Please show steps so I can understand. Thanks in advance!!!