Final answer:
An upside-down triangle is still a triangle with its base at the top and its tip pointing downward.
Step-by-step explanation:
An upside-down triangle is still a triangle. A triangle is a three-sided polygon, and an upside-down triangle has its base at the top and its tip pointing downward. The sum of the angles in any triangle is always 180 degrees. In an upside-down triangle, the angles will still add up to 180 degrees, although their positions will be reversed.