24. Find the value of x. 60° 30° to 72 55 46 O 67 O 77 87 O 97

Elementary Geometry For College Students, 7e
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ISBN:9781337614085
Author:Alexander, Daniel C.; Koeberlein, Geralyn M.
Publisher:Alexander, Daniel C.; Koeberlein, Geralyn M.
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### Geometry Problem: Finding the Value of x

**Problem Statement:**

In the given diagram, several angles of a polygon are provided. Your task is to find the value of the unknown angle marked as \( x \).

**Given:**
- The measure of the angles next to \( x \) are 60°, 30°, 72°, 46°, and 55°.

**Diagram Description:**
The diagram is a pentagon with angles at each vertex. The angles provided in the diagram are:
- One angle is marked with a small blue arc and labeled as 55°.
- Another angle adjacent to it is marked with another small blue arc and labeled as 46°.
- Continuing in a clockwise direction, the next angles are marked as 72°, 30°, and 60°.
- One angle is marked as \( x \), which is the unknown that needs to be determined.

**Choices:**
- \( x \) can be:
  - 67°
  - 77°
  - 87°
  - 97°

**Procedure to Find \( x \):**

1. **Sum of Interior Angles of a Polygon:**
   For a polygon with \( n \) sides, the sum of the interior angles is given by the formula:
   \[
   180^\circ \times (n - 2)
   \]
   Since this is a pentagon (\( n = 5 \)):
   \[
   180^\circ \times (5 - 2) = 540^\circ
   \]

2. **Sum of Known Angles:**
   Summing up the given angles:
   \[
   55^\circ + 46^\circ + 72^\circ + 30^\circ + 60^\circ = 263^\circ
   \]

3. **Find \( x \):**
   To find the unknown angle \( x \):
   \[
   540^\circ - 263^\circ = 277^\circ
   \]

Therefore, the value of \( x \) must be 97°.

**Answer:**
\[ x = 97^\circ \]

**Options:**
- 67°
- 77°
- 87°
- **97°**

The correct answer is 97°.
Transcribed Image Text:### Geometry Problem: Finding the Value of x **Problem Statement:** In the given diagram, several angles of a polygon are provided. Your task is to find the value of the unknown angle marked as \( x \). **Given:** - The measure of the angles next to \( x \) are 60°, 30°, 72°, 46°, and 55°. **Diagram Description:** The diagram is a pentagon with angles at each vertex. The angles provided in the diagram are: - One angle is marked with a small blue arc and labeled as 55°. - Another angle adjacent to it is marked with another small blue arc and labeled as 46°. - Continuing in a clockwise direction, the next angles are marked as 72°, 30°, and 60°. - One angle is marked as \( x \), which is the unknown that needs to be determined. **Choices:** - \( x \) can be: - 67° - 77° - 87° - 97° **Procedure to Find \( x \):** 1. **Sum of Interior Angles of a Polygon:** For a polygon with \( n \) sides, the sum of the interior angles is given by the formula: \[ 180^\circ \times (n - 2) \] Since this is a pentagon (\( n = 5 \)): \[ 180^\circ \times (5 - 2) = 540^\circ \] 2. **Sum of Known Angles:** Summing up the given angles: \[ 55^\circ + 46^\circ + 72^\circ + 30^\circ + 60^\circ = 263^\circ \] 3. **Find \( x \):** To find the unknown angle \( x \): \[ 540^\circ - 263^\circ = 277^\circ \] Therefore, the value of \( x \) must be 97°. **Answer:** \[ x = 97^\circ \] **Options:** - 67° - 77° - 87° - **97°** The correct answer is 97°.
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