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Mathematics 16 Online
OpenStudy (anonymous):

Which angle has the greater measure? A. angle A B. angle E C. angle C D. The angles are congruent

OpenStudy (anonymous):

OpenStudy (nikato):

angle A because exterior angles are larger than the interior angles

OpenStudy (mathstudent55):

@nikato, you have the correct answer but the wrong reason. Look in figure below. Exterior angle 1 is larger than interior angle 2, so your statement is oncorrect. |dw:1383022437676:dw|

OpenStudy (mathstudent55):

^incorrect

OpenStudy (mathstudent55):

There is a theorem that states: In a triangle the measure of an exterior angle is equal to the sum of its two remote interior angles.

OpenStudy (nikato):

no, its an exterior angle is greater than each of its remote interior angle

OpenStudy (mathstudent55):

That's better. In this triangle, angle A is an exterior angle and angles E and C are its remote interior angles. Since m<A = m<C + m<E, that means m<A must be greater than m<C or m<E.

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