Question

ПЕРИМЕТР РАВНОБЕДРЕННОГО ТРЕУГОЛЬНИКА РАВЕН 18 СМ.ОДНА ИЗ ЕГО СТОРОН РАВНА 5 СМ.НАЙДИТЕ ДЛИНЫ ДРУГИХ СТОРОН.

Answer 1

1 ст=5см
2ст=5см
3 ст=8см

Answer 2

Perimeter of an Isosceles Triangle

To find the lengths of the other sides of an isosceles triangle when the perimeter is 18 cm and one side is 5 cm, we can use the formula for the perimeter of a triangle:

Perimeter = Sum of all sides

Let's denote the length of the equal sides of the triangle as 'a' and the length of the base as 'b'. Since it is an isosceles triangle, two sides are equal in length.

Given: Perimeter = 18 cm One side = 5 cm

Using the formula, we can write the equation as:

18 = 5 + a + a

Simplifying the equation, we get:

18 = 2a + 5

Now, we can solve for 'a':

2a = 18 - 5

2a = 13

a = 13/2

a = 6.5 cm

So, the length of each equal side of the isosceles triangle is 6.5 cm.

To find the length of the base 'b', we can subtract twice the length of one side from the perimeter:

b = Perimeter - 2a

b = 18 - 2(6.5)

b = 18 - 13

b = 5 cm

Therefore, the length of the base of the isosceles triangle is 5 cm.

To summarize: - Length of each equal side (a) = 6.5 cm - Length of the base (b) = 5 cm

Please note that the lengths of the sides are approximate values rounded to one decimal place.