The figure below is a square. Find the length of side a in simplest radical form with a rational denominator.

Elementary Geometry For College Students, 7e
7th Edition
ISBN:9781337614085
Author:Alexander, Daniel C.; Koeberlein, Geralyn M.
Publisher:Alexander, Daniel C.; Koeberlein, Geralyn M.
ChapterP: Preliminary Concepts
SectionP.CT: Test
Problem 1CT
Topic Video
Question
**Problem Statement:**

The figure below is a square. Find the length of side \( x \) in simplest radical form with a rational denominator.

![Diagram of a square with a diagonal line segment](insert_image_url_here)

In the diagram, one of the sides of the square is labeled as \( 9 \) and the diagonal is labeled as \( x \).

**Solution:**

To solve this problem, we need to recall the property of a square's diagonal. 

1. Let's denote the side of the square as \( s \). For a square, all sides are equal, so each side length is \( s = 9 \).
2. The diagonal \( x \) of the square is related to the side length by the formula:
\[
x = s \sqrt{2}
\]
3. Substituting \( s = 9 \):
\[
x = 9 \sqrt{2}
\]

Thus, the length of the diagonal \( x \) in simplest radical form is \( 9\sqrt{2} \).

**Answer:**
The length of side \( x \) in simplest radical form with a rational denominator is \( 9\sqrt{2} \).

**Diagram Explanation:**

The diagram shows a square with one side labeled as 9 units. A diagonal line segment divides the square into two right triangles, creating sides of \( 9 \) units and a hypothenuse labeled as \( x \). In this setup, we used the Pythagorean theorem in combination with properties of squares to determine the length of the diagonal.
Transcribed Image Text:**Problem Statement:** The figure below is a square. Find the length of side \( x \) in simplest radical form with a rational denominator. ![Diagram of a square with a diagonal line segment](insert_image_url_here) In the diagram, one of the sides of the square is labeled as \( 9 \) and the diagonal is labeled as \( x \). **Solution:** To solve this problem, we need to recall the property of a square's diagonal. 1. Let's denote the side of the square as \( s \). For a square, all sides are equal, so each side length is \( s = 9 \). 2. The diagonal \( x \) of the square is related to the side length by the formula: \[ x = s \sqrt{2} \] 3. Substituting \( s = 9 \): \[ x = 9 \sqrt{2} \] Thus, the length of the diagonal \( x \) in simplest radical form is \( 9\sqrt{2} \). **Answer:** The length of side \( x \) in simplest radical form with a rational denominator is \( 9\sqrt{2} \). **Diagram Explanation:** The diagram shows a square with one side labeled as 9 units. A diagonal line segment divides the square into two right triangles, creating sides of \( 9 \) units and a hypothenuse labeled as \( x \). In this setup, we used the Pythagorean theorem in combination with properties of squares to determine the length of the diagonal.
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