Question

Сумма длин всех сторон (периметр)треугольника 9дм 8см.одна его сторона равна 3дм.а вторая 26 см.найди длинну третьей стороны?

Answer 1

908 - (300 + 26) = 582 см

Answer 2

Finding the Length of the Third Side of a Triangle

To find the length of the third side of a triangle, we can use the formula for the perimeter of a triangle, which is the sum of the lengths of all three sides. In this case, we are given that the perimeter of the triangle is 9 dm 8 cm, one side is 3 dm, and the second side is 26 cm.

Let's break down the given information: - Perimeter of the triangle: 9 dm 8 cm - Length of one side: 3 dm - Length of the second side: 26 cm

To find the length of the third side, we need to convert all the measurements to the same unit. Let's convert the length of the second side from centimeters to decimeters, so that all the measurements are in decimeters.

Converting 26 cm to decimeters: 1 cm = 0.1 dm 26 cm = 26 * 0.1 dm = 2.6 dm

Now, we have the following measurements: - Perimeter of the triangle: 9 dm 8 cm = 9 dm + 0.8 dm = 9.8 dm - Length of one side: 3 dm - Length of the second side: 2.6 dm

To find the length of the third side, we can subtract the sum of the lengths of the first two sides from the perimeter of the triangle:

Length of the third side = Perimeter - (Length of the first side + Length of the second side)

Length of the third side = 9.8 dm - (3 dm + 2.6 dm)

Length of the third side = 9.8 dm - 5.6 dm

Length of the third side = 4.2 dm

Therefore, the length of the third side of the triangle is 4.2 dm.