Question

В равнобедренном треугольнике одна сторона равна 25 см, а другая равна 10 см. Какая из них является основанием?

Answer 1

Может быть как 25, так и 10... Смотря от того, какая 3я сторона

Answer 2

Основанием является сторона 10см, т.к. сумма любых двух сторон треугольника должна быть больше третьей

Answer 3

Identifying the Base of an Isosceles Triangle

In an isosceles triangle, one side is equal to 25 cm, and the other side is equal to 10 cm. We need to determine which of these sides is the base of the triangle.

The base of an isosceles triangle is the side opposite the vertex angle.

The side opposite the vertex angle is the base of the triangle. Let's identify the vertex angle to determine the base.

Identifying the Vertex Angle

To identify the vertex angle, we can use the properties of an isosceles triangle.

In an isosceles triangle, the angles opposite the equal sides are also equal.

Let's calculate the vertex angle using the given side lengths.

Calculating the Vertex Angle

We can use trigonometric functions to calculate the vertex angle of the isosceles triangle.

Using the given side lengths: - Side a = 25 cm - Side b = 10 cm

We can use the formula: a = b = c (where c is the base)

From the formula: a + b = 2 * a = 25 So, a = 25 / 2 = 12.5 cm

Now, we can calculate the vertex angle using the side lengths.

Conclusion

Based on the calculations, the side with a length of 25 cm is the base of the isosceles triangle.