SOLUTION: If the base of an isosceles triangle is produced on both sides, prove that the exterior angles so formed are equal to each.

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Question 1043417: If the base of an isosceles triangle is produced on both sides, prove that the exterior angles so formed are equal to each.

Found 2 solutions by ikleyn, MathTherapy:
Answer by ikleyn(52851) About Me  (Show Source):
You can put this solution on YOUR website!
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If the base of an isosceles triangle is produced (EXTENDED) on both sides, prove that the exterior angles so formed are equal to each.
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Use the fact that the interior angles at the base are congruent for any isosceles triangles.

The exterior angle is a supplement to the interior angle.


Answer by MathTherapy(10555) About Me  (Show Source):
You can put this solution on YOUR website!

If the base of an isosceles triangle is produced on both sides, prove that the exterior angles so formed are equal to each.
An exterior angle formed by extending a side of a triangle is equal to the sum of its INTERIOR OPPOSITE angles.