babyychina
babyychina babyychina
  • 24-06-2017
  • Mathematics
contestada

find m A. 20
B. 40
C. 60
D.120

find m A 20 B 40 C 60 D120 class=

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Banabanana
Banabanana Banabanana
  • 24-06-2017
∠FEG is an exterior angle.
An exterior angle of a triangle is equal to the sum of the opposite interior angles, so

2x + x = x + 40
3x = x + 40
3x - x = 40
2x = 40
x = 20

m∠FEG = x+40 = 20+40 = 60°
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baileykaleb00
baileykaleb00 baileykaleb00
  • 25-06-2017
the answer is C. 

 I only know this because it is an acute angle so "D" is wrong. It is also too wide to be "A" or "B" so the only of that is left is "C". through process of elimination.
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