jasonhua610 jasonhua610
  • 12-07-2020
  • Mathematics
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Find the indicated measure.

Find the indicated measure class=

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Аноним Аноним
  • 12-07-2020

Answer:

Arc EFC has a measure of 234 degrees.

Step-by-step explanation:

The measure of arc  EFC = the measure of arc EF + the measure of arc BF + the measure of arc BC.

Arc BFE looks like a semicircle.

A semicircle has a measure of 180 degrees.

Arc BF + arc FE = 180 degrees

Arc BF has a measure of 126 degrees.

126 + arc FE = 180

arc FE = 54 degrees

Arc FE = Arc BC

Their central angles are equal by vertical angle theorem.

EFC = EF+BF+BC

EFC = 54 + 126 + 54

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