Exterior Angle Theorem Angle Bisector

The figure is an example of a(n) ...

• angle bisector

• perpendicular bisector

• median

• midsegment

Angle JHG measures 161.

• m∠GHK=80.5,

  m∠KHJ=161

• m∠GHK=161,

  m∠KHJ=80.5

• m∠GHK=80.5,

  m∠KHJ=80.5

• m∠GHK=161,

  m∠KHJ=161

What is reason 1?

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Determine the Conclusion.

• Then ∠BCA ≅ ∠DCA.

• Then ∠BAC ≅ ∠DAC.

• Then Segment AB is congruent to Segment AD.

• Then ∠BAC and ∠DAC are right angles.

What is reason 3?

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If AD bisects <EDI, then

• <ADE=<IDA

• IA=AE

• ID=ED