Question

Периметр равнобедренного треугольника 12 см, а боковая сторона 5 см. Найдите основание

Answer 1

2 боковые стороны равнобедренного треугольника всегда будут равны между собой=12-5-5=2см
ответ:2 см

Answer 2

Perimeter of an Isosceles Triangle

To find the base of an isosceles triangle given the perimeter and one of the sides, we can use the formula for the perimeter of a triangle:

Perimeter = sum of all sides

In this case, we are given that the perimeter of the triangle is 12 cm and one of the sides (which is also the base) is 5 cm. Let's denote the base as 'b' and the two equal sides as 'a'.

Using the formula for the perimeter, we can write the equation as:

12 = a + a + b

Since it is an isosceles triangle, the two equal sides have the same length. Therefore, we can simplify the equation to:

12 = 2a + b

Now, we can substitute the given values into the equation and solve for 'b':

12 = 2(5) + b

Simplifying further:

12 = 10 + b

Subtracting 10 from both sides:

2 = b

Therefore, the base of the isosceles triangle is 2 cm.