Perimeter of Isosceles Triangles

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What is an isosceles triangle?

A triangle with at least two sides of equal length.

How do you calculate the perimeter of an isosceles triangle?

Perimeter = 2(a) + b, where 'a' is the length of the two equal sides, and 'b' is the base.

If the equal sides of an isosceles triangle are 5 cm each and the base is 8 cm, what is its perimeter?

The perimeter is 18 cm.

How would the perimeter formula change if only the base length is given?

Without additional information or context, you can't fully determine the perimeter with only the base in an isosceles triangle.

What roles do the congruent angles of an isosceles triangle play in perimeter calculations?

Congruent angles do not directly affect the perimeter calculation, which is based solely on the lengths of the sides.