Find the sides of an isosceles triangle if its perimeter is 70cm and the base is 2 times smaller than the lateral side, find the side of an isosceles triangle and its base.
An isosceles triangle is a triangle whose two sides are equal. Let’s denote the length of the base of the triangle by “x”, then the side is 2x centimeters. Knowing that the perimeter of a triangle is equal to the sum of the lengths of all sides of the triangle and is equal to 70 centimeters, we draw up an equation.
x + 2x + 2x = 70;
Simplify the expression on the left side of the equation. To do this, we find the value of the sum of similar monomials on the left side of the equation.
5 * x = 70;
x = 70/5;
x = 14 cm.
The base is 14 cm, and the side is 2 * 14 = 28 cm.
Answer: 14 cm, 28 cm, 28 cm.
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