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Points G and H lie on circle F as shown below. If the measure of
FGH is 40°, then what is the measure of central angle
ZGFH ?
Н
F.
60°
G. 80°
H. 100°
J. 120°
404
K. Cannot be determined from the
information given
G
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sqdancefan

9514 1404 393

Answer:

  H.  100°

Step-by-step explanation:

ΔFGH is isosceles with base angles both equal to 40°. Then the angle at F, the central angle GFH, is ...

  180° -2(40°) = 100° . . . . measure of ∠GFH

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