An isosceles triangle is a triangle in which two sides are equal, they are called lateral, and the third side is called the base.
Knowing the lengths of the two sides of an isosceles triangle, it is easy to conclude that one of them is the base, and the other is the side.
If we assume that 2 cm is the base, and 8 cm is the side, therefore the third side of the triangle is also the side equal to 8 cm.
Conversely, if 8 cm is the base, then the second and third sides of the triangle are 2 cm.
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