Question

Периметр рівнобедреного трикутника дорівнює 42 см а його основа - 12 см знайді ть бічну сторону

Answer 1

Ответ:

15 см

Объяснение:

42-12=30 (см) сума бічних сторін

30:2=15 (см) бічна сторона

Answer 2

Perimeter of an Isosceles Triangle

To find the length of the side of an isosceles triangle when given the perimeter and the length of the base, we need to use the formula for the perimeter of an isosceles triangle.

The formula for the perimeter of an isosceles triangle is:

Perimeter = 2 * side + base

In this case, we are given that the perimeter of the triangle is 42 cm and the length of the base is 12 cm. Let's substitute these values into the formula and solve for the length of the side.

42 cm = 2 * side + 12 cm

To find the length of the side, we need to isolate it on one side of the equation. Let's start by subtracting 12 cm from both sides of the equation:

42 cm - 12 cm = 2 * side

Simplifying the equation:

30 cm = 2 * side

Now, we can divide both sides of the equation by 2 to solve for the length of the side:

30 cm / 2 = side

15 cm = side

Therefore, the length of the side of the isosceles triangle is 15 cm.

Please let me know if there is anything else I can help you with!