Geometry

Question Analysis:
This question involves the perimeter formula of a triangle and the properties of isosceles triangles.
The main focus is on using the given perimeter and base - length values to find the length of the equal sides.

Key Concept Explanation:
The perimeter of a triangle is the sum of the lengths of its three sides, i.e., .
In an isosceles triangle, if the length of the base is and the length of each equal side is , then .

Step - by - Step Solution:
We know that cm and cm.
Substitute these values into the perimeter formula :
We get

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