Question

Периметр равнобедренного треугольника равен 20 см. Его боковая сторона ас равна 7 см. найдите остальные стороны

Answer 1

Решение:
b=AC=BC, a=AB
Сторона AC=7 см, то BC=7 см.
P=a+2b
20=a+2*7
a=20-14
a=6 (см)
Ответ: BC=7 см, AB=6 см.

Answer 2

Допустим треугольник ABC
P=20
AC=7
________
20-7*2=6

Ответ: AB= 7, BC=6

Answer 3

Finding the Sides of an Isosceles Triangle

To find the remaining sides of an isosceles triangle when the perimeter is 20 cm and one of the sides (let's call it "a") is 7 cm, we can use the following approach:

1. Identify the Perimeter: - The perimeter of the triangle is given as 20 cm.

2. Use the Perimeter Formula: - The perimeter of a triangle is calculated by adding the lengths of all its sides. For an isosceles triangle, where two sides are equal, the perimeter formula can be expressed as: - Perimeter = a + b + c, where a, b, and c are the lengths of the sides.

3. Determine the Remaining Sides: - Since it's an isosceles triangle, two sides are equal in length. Let's assume the length of the remaining sides is also "a" for now.

4. Calculate the Remaining Side Length: - We can use the given perimeter and the length of one side to find the length of the remaining sides.

Calculation

Using the given information, we can calculate the length of the remaining side "b" as follows:

- Perimeter = a + b + c - 20 = 7 + b + 7 - 20 = 14 + b - b = 20 - 14 - b = 6

So, the lengths of the remaining sides are both 6 cm.

Therefore, the lengths of the remaining sides of the isosceles triangle are 6 cm each.