evemanoj86
evemanoj86 evemanoj86
  • 23-07-2021
  • Mathematics
contestada

Full working out for this question please

Full working out for this question please class=

Respuesta :

evgeniylevi
evgeniylevi evgeniylevi
  • 23-07-2021

Answer:

C.

Step-by-step explanation:

according to the condition it is possible to calculate the values of ∠DEF; ∠CDE and ∠DCF:

1) m∠DEF=m∠BAE=104°;

2) m∠CDE=180-m∠BAE=180-104=76°;

3) m∠DCF=m∠BAE-m∠BCF=104-60=44°;

the required value of the angle EFC is:

4) m∠EFC=360- (m∠DEF+m∠CDE+m∠DCF)=360-104-76-44=136°

5) the correct answer is: C. 136°.

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