Question

Бична сторона ривнобедреного трикутника доривнюе 18см а його периметр 42см знайдить основу трикутника

Answer 1

42 - (18 *2) = 6 см                    

Answer 2

18*2=36 см бічні сторони
42-36= 6 см основа

Answer 3

Finding the Base of an Isosceles Triangle

To find the base of an isosceles triangle, we can use the formula for the perimeter of a triangle and the fact that the triangle is isosceles, meaning two of its sides are equal in length.

Given: - The base of the isosceles triangle is 18 cm. - The perimeter of the triangle is 42 cm.

We can use the formula for the perimeter of a triangle, which is the sum of the lengths of its three sides:

Perimeter = Base + Side1 + Side2

Since the triangle is isosceles, Side1 and Side2 are equal. Let's denote the length of Side1 (or Side2) as "x".

Calculating the Length of the Sides

We can set up an equation using the given information: 42 = 18 + x + x

Solving for x: 42 = 18 + 2x 2x = 42 - 18 2x = 24 x = 12

So, the length of Side1 (or Side2) is 12 cm.

Finding the Base

Since the base of the triangle is equal to 18 cm, we have all the information we need to find the base of the triangle.

Therefore, the base of the isosceles triangle is 18 cm.

This calculation is based on the given information and the properties of an isosceles triangle.