ans:39
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first prove triangle BHC similar to FDC.Reason(AA)
then,provrSBH and GBH congruent(SAS)
CB=CG
CBG is an isolesis triangle
angle G and CBG is X
angle BCG=180-90-12=180-78=102
X=(108-102)/2=39
Answer:
it is 5
Step-by-step explanation: