I believe that is an isosceles triangle.
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There are two types of triangle: 1. Scalene triangle - no sides have the same length 2. Isosceles triangle - at least two sides have the same length a. Equilateral triangle - an isosceles triangle with 3 sides the same length.
An EQUILATERAL triangle has all three sides the same length. An ISOSCELES triangle has two sides with the same length. A SCALENE triangle has all three sides different lengths.
No sides of a scalene triangle are the same length.
equilateral triangle- all sides the same length isosceles triangle- 2 sides the same length scalene triangle- no sides the same length
If all of its sides are the same length its an equilateral triangle. If only two of its sides are the same length it is an isosceles triangle. If all the sides are different lengths it is a scalene triangle