Understanding the Segment Addition Postulate: Solving for Unknown Segment Lengths in Geometry

Segment Addition Postulate

The Segment Addition Postulate is a fundamental concept in geometry that deals with the addition of the lengths of two or more line segments to find the length of another segment

The Segment Addition Postulate is a fundamental concept in geometry that deals with the addition of the lengths of two or more line segments to find the length of another segment.

According to the Segment Addition Postulate, if we have three points A, B, and C that are collinear (meaning they lie on the same line), then the length of segment AB plus the length of segment BC will equal the length of segment AC.

Mathematically, this can be represented as:

AB + BC = AC

This postulate works for both real numbers and geometric measurements such as length.

To illustrate this with an example, let’s say we have a line segment AB with a length of 3 units, and another segment BC with a length of 5 units. We want to find the length of the segment AC.

Using the Segment Addition Postulate, we have:

AB + BC = AC

Plugging in the values we have:

3 + 5 = AC

Simplifying:

8 = AC

So, the length of segment AC is 8 units.

This postulate is an important tool in solving various geometric problems, including those that involve finding the length of a specific segment within a larger figure. By breaking down the figure into smaller line segments and applying the Segment Addition Postulate, we can find the desired length accurately.

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