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Assume that lines which appear tangent are tangent

Assume that lines which appear tangent are tangent-example-1

2 Answers

2 votes

Answer:

b

Explanation:

360-244/2= 116/2=58 or b

User Piotr Dobrogost
by
5.0k points
3 votes

Answer:

B

Explanation:

Remark

This is a monster when you first come across it, but later on you will not be fooled.

Construction

  • Draw a line from E to the center of the circle.
  • Label the center of the circle O
  • OE and OF are both radii.
  • They form the central angle of the ArcEF

Solution

Find the value of Arc EF

The value of Arc EF = 360 - 244 = 116

The value of <FOE also = 116. (The arc and the central angle are equal.)

ΔFOE = 116 degrees See above statement

ΔFOE is isosceles Two of it's sides are radii.

The two base angles can be solved. Call each one x

2x + 116 = 180 All triangles have 180 degrees

-116 -116 Subtract 116 from both sides

2x = 64 Divide by 2

x = 32 <EFO = 32

<EFO = 90 Where the tangent meets the radius forms a 90o angle.

<EFO + GFE = 90

32 + GFE =90

GFE = 90 - 32

GFE = 58

Answer: B

User Erkka Mutanen
by
4.9k points