A triangle with no equal sides and no equal angles is called a scalene triangle. In contrast, a triangle with equal sides and equal angles is called an equilateral triangle. A triangle with two equal sides and two equal angles is an isosceles triangle.
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A non-existent triangle.
A line of symmetry implies that there are at least two equal angles.
An isosceles triangle has 2 equal sides and 2 equal angles.
A triangle that has three equal sides, and therefore three equal angles, is called an equilateral triangle.
The base angles of an isosceles triangle that has two equal sides are equal.
A triangle with no equal sides or angles is known as a scalene triangle. Equilateral triangles, by contrast, have three equal sides and three 60 degree angles.
There cannot be a triangle which has 2 equal sides and 3 equal angles. The number of sides and angles which are equal must be the same: 0, 2 or 3.