Question

На прямой отложили два отрезка.Отрезок AB в три раза длиннее, чем отрезок BC. Отрезок BC на 4 см короче отрезка AB. Построй отрезок AC. помогите срочно, очень надо!!!

Answer 1

Ответ:

Пошаговое объяснение:

AB=x; BC=y

x=3y; x=y+4

3y=y+4; 2y=4; y=2

x=2+4=6

AC=10см

Answer 2

Problem Analysis

We are given two line segments, AB and BC. The length of AB is three times the length of BC, and BC is 4 cm shorter than AB. We need to construct the line segment AC.

Solution

To solve this problem, we can follow these steps:

1. Let's assume the length of BC is x cm. Since AB is three times the length of BC, the length of AB is 3x cm. 2. We are also given that BC is 4 cm shorter than AB. So, we can write the equation: AB - BC = 4. 3. Substituting the values of AB and BC from step 1, we get: 3x - x = 4. 4. Simplifying the equation, we have: 2x = 4. 5. Solving for x, we find: x = 2. 6. Now that we know the length of BC is 2 cm, we can find the length of AB by multiplying it by 3: AB = 3 * 2 = 6 cm. 7. Finally, we can construct the line segment AC by adding the lengths of AB and BC: AC = AB + BC = 6 cm + 2 cm = 8 cm.

Therefore, the length of the line segment AC is 8 cm.

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