The perimeter of an isosceles triangle is 4 times the base and 10cm more than the side. Find the sides of the triangle.

1. The base of an isosceles triangle is x centimeters.

2. Its perimeter is x * 4 = 4x centimeters.

3. The side is (4x – 10) centimeters.

4. Let’s make an equation.

x + (4x – 10) * 2 = 4x;

x + 8x – 20 = 4x;

9x – 4x = 20;

5x = 20;

x = 20/5 = 4;

Answer: The base is x = 4 centimeters, the side is 4x – 10 = 4 * 4 – 10 = 6 centimeters.




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