In an isosceles triangle, the vertex angle is twice the each base angle. What is the vertex angle?
Since the sum of the interior angles of any triangle adds up to
Therefore the vertex angle is
An isosceles triangle has two sides of equal length. Likewise, the opposite angles of the sides are the same
So lets assume each angle be
Now, we know that sum of the angles in a triangle is 180 degree
Now the other angle is
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