Find the value of the variables.

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
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### Find the Value of the Variables

**Problem 5:** 

In this problem, you are given a circle with four points on its circumference labeled as A, B, C, and D. These points form a cyclic quadrilateral. The measures of two of its interior angles are given as follows:
- Angle BCD is 68°
- Angle ADB is 82°

The other two angles are represented as variables:
- Angle B is labeled as \( x^\circ \)
- Angle BAD is labeled as \( y^\circ \)

The task is to find the values of \( x \) and \( y \).

**Explanation:**

In a cyclic quadrilateral, the sum of the opposite angles is 180°. So, you can use this property to find the unknown angles.

1. **Finding \( x^\circ \):**
   - Since angles BCD and \( x^\circ \) are opposite angles, we can use the property:
   \[
   x + 68^\circ = 180^\circ
   \]
   Simplifying for \( x \):
   \[
   x = 180^\circ - 68^\circ = 112^\circ
   \]

2. **Finding \( y^\circ \):**
   - Similarly, angles ADB and \( y^\circ \) are opposite angles, so:
   \[
   y + 82^\circ = 180^\circ
   \]
   Simplifying for \( y \):
   \[
   y = 180^\circ - 82^\circ = 98^\circ
   \]

Thus, the values of the variables are:
- \( x = 112^\circ \)
- \( y = 98^\circ \)
Transcribed Image Text:### Find the Value of the Variables **Problem 5:** In this problem, you are given a circle with four points on its circumference labeled as A, B, C, and D. These points form a cyclic quadrilateral. The measures of two of its interior angles are given as follows: - Angle BCD is 68° - Angle ADB is 82° The other two angles are represented as variables: - Angle B is labeled as \( x^\circ \) - Angle BAD is labeled as \( y^\circ \) The task is to find the values of \( x \) and \( y \). **Explanation:** In a cyclic quadrilateral, the sum of the opposite angles is 180°. So, you can use this property to find the unknown angles. 1. **Finding \( x^\circ \):** - Since angles BCD and \( x^\circ \) are opposite angles, we can use the property: \[ x + 68^\circ = 180^\circ \] Simplifying for \( x \): \[ x = 180^\circ - 68^\circ = 112^\circ \] 2. **Finding \( y^\circ \):** - Similarly, angles ADB and \( y^\circ \) are opposite angles, so: \[ y + 82^\circ = 180^\circ \] Simplifying for \( y \): \[ y = 180^\circ - 82^\circ = 98^\circ \] Thus, the values of the variables are: - \( x = 112^\circ \) - \( y = 98^\circ \)
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