Respuesta :

Answer:

A=54    D=42

B= 102. E=18

C=105. F=20


Step-by-step explanation:

A: 54 bc Alt. int angles

B:180-78=102

C:142-37=105

D:73-31=42

E:18 diagonals bisect each other

F:20 bc EC*2=AC

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