The perimeter of an isosceles triangle is 41 cm, the lateral side is 3.5 cm less than the base. Find the base triangle.

univerkov | May 23, 2021 | education

Let’s denote the length of the base of an isosceles triangle through x cm, then both sides are (x – 3.5) cm.

Let’s make an equation for the sum of all sides (perimeter).

x + (x – 3.5) * 2 = 41;

x + 2x = 41 + 7;

3x = 48;

x = 48/3 = 16 cm.

Answer: the base of the triangle is 16 cm.

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