If two angles in a triangle were both 90 degrees, what would the third angle be?

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Multiple Choice

If two angles in a triangle were both 90 degrees, what would the third angle be?

Explanation:
In any triangle, the interior angles add up to 180 degrees. If two angles are each 90 degrees, their total is 180 degrees, leaving 0 degrees for the third angle. An angle of 0 degrees means there’s no opening at that vertex, so the figure isn’t a proper triangle—it's a degenerate case. So the only way to satisfy the angle sum is a third angle of 0 degrees, though two right angles cannot occur in a non-degenerate triangle.

In any triangle, the interior angles add up to 180 degrees. If two angles are each 90 degrees, their total is 180 degrees, leaving 0 degrees for the third angle. An angle of 0 degrees means there’s no opening at that vertex, so the figure isn’t a proper triangle—it's a degenerate case. So the only way to satisfy the angle sum is a third angle of 0 degrees, though two right angles cannot occur in a non-degenerate triangle.

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