If all three sides are 9 inches in length, then it is an EQUILATERAL Triangle.
All the angles are 60 degrees.
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The sides of a triangle add up to the perimeter.
A triangle can have only three sides. No triangle can have 9 sides!
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An equilateral triangle has three equal sides. The angles of an equilateral triangle measure 60 degrees each, but the sides can be any length.
it is an issosolesse triangle