Classify the following triangles as scalene, isosceles, or equilateral according to the lengths of their sides.
(1) $15 c m, 20 c m, 15 c m$

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Solution

In scalene triangle all the three sides are unequal.
Isosceles triangle is a triangle whose any two sides are equal.
In this triangle only two sides are equal.
Hence, this is a isosceles triangle.

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