Question

Периметр равнобедренного треугольника 68 см. Боковая сторона 20 см. Найди основание.

Answer 1

Если это равнобедренный треугольник АBC, то боковые стороны равны(AB=BC=20 см). AC(основание)=68-28+28=12см.
Ответ: 12 см - основание АС
 

Answer 2

Finding the Base of an Isosceles Triangle

To find the base of an isosceles triangle when the perimeter is 68 cm and one of the equal sides is 20 cm, we can use the formula for the perimeter of a triangle and the properties of an isosceles triangle.

The perimeter of a triangle is given by the formula: Perimeter = Sum of all sides

In the case of an isosceles triangle, where two sides are equal, the perimeter can be expressed as: Perimeter = 2 * (length of equal side) + base

Given: - Perimeter = 68 cm - Length of equal side = 20 cm

We can use these values to find the base of the triangle.

Calculation

Using the formula for the perimeter of an isosceles triangle: 68 = 2 * 20 + base

Solving for the base: 68 = 40 + base base = 68 - 40 base = 28 cm

Therefore, the base of the isosceles triangle is 28 cm.

This calculation is based on the formula for the perimeter of an isosceles triangle and the given values of the perimeter and the length of one of the equal sides.

I hope this helps! If you have further questions or need additional assistance, feel free to ask.