Question

Периметр равнобедренного треугольника равен 39см,а основание 15 см. найдите боковые стороны треугольника

Answer 1

АВ+ВС=39-15=24 СМ
АВ=ВС=24:2=12 СМ

Answer 2

Perimeter of an Isosceles Triangle

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

Perimeter = Sum of all three sides

In this case, the perimeter of the triangle is given as 39 cm, and the length of the base is 15 cm. Let's assume the lengths of the two equal sides are x cm each.

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

39 = x + x + 15

Simplifying the equation, we get:

2x + 15 = 39

Now, we can solve for x:

2x = 39 - 15

2x = 24

x = 12

So, the lengths of the two equal sides of the triangle are 12 cm each.

Therefore, the lengths of the sides of the triangle are: - Base: 15 cm - Equal sides: 12 cm each

Please note that the lengths of the sides are approximate values rounded to the nearest whole number.