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Triangle A B C is shown with its exterior angles. Line B A extends through point D. Line A B extends through point E. Line A C extends through point F. Which angle's measure is equal to the sum of the measures of ∠BAC and ∠BCA?

User Savaratkar
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2 Answers

9 votes

Answer:

angleCBE

Explanation:

User Michal Sznajder
by
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9 votes

Answer:

∠CBE

Explanation:

Find the diagram attached

Using the exterior property of a triangle which states that the sum of interior angles of a triangle is equal to the exterior angle.

Given the following from the diagram

Interior angles are ∠BAC and ∠BCA

Exterior angle = <CBE = a+b

Using the law above,

∠BAC + ∠BCA = ∠CBE

Hence the angle's measure that is equal to the sum of the measures of ∠BAC and ∠BCA is ∠CBE

Triangle A B C is shown with its exterior angles. Line B A extends through point D-example-1
User Madhusudhan
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