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When two parallel lines are cut by a transversal, the two pairs of angles on opposite sides of the transversal and outside the parallel lines, and the angles in each pair are congruent.

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Q: What does alternate exterior angle mean?
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Related questions

Why are alternate interior angles and alternate exterior angles both called alternate?

Both alternate interior and alternate exterior angle pairs lie on opposite sides of the transversal.

What is PAEC Theorem?

Pairs of Alternate Exterior Angle are Congruent

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It is the alternate angle to the angle of elevation

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The answer depends totally on how the angles are numbered. And since you have not bothered to provide that information, I cannot provide a sensible answer.

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If you mean a regular pentagon then each interior angle is 108 degrees and each exterior angle is 72 degrees

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What is an exterior angle of a triangle and how does the measure of an exterior angle relate to the interior angles?

Exterior angle+interior angle=180 degrees and 180-exterior angle=interior angle

What is the name of the regular polygon whose exterior angles are twice its exterior angles?

If you mean exterior angle is twice its interior angle then an equilateral triangle will fit the given description because each interior angle is 60 degrees and each exterior angle is 120 degrees