5. In circle M, the central angle LMN measures (14x-48)° and inscribed angle LPN measures (5x+12)°. What is the measure of LN in degrees? 19v-48 5X+2

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
Question
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Answer question 5

### Geometry Problem: Central and Inscribed Angles

**Problem Statement:**

5. In circle \(M\), the central angle \(\angle LMN\) measures \((14x - 48)^\circ\) and the inscribed angle \(\angle LPN\) measures \((5x + 12)^\circ\). What is the measure of arc \(\overset{\frown}{LN}\) in degrees?

**Illustration Description:**

The image depicts a diagram of a circle with center \(M\). Points \(L\), \(N\), and \(P\) are located on the circumference of the circle, creating two angles:
- \(\angle LMN\) is the central angle, indicated as \((14x - 48)^\circ\).
- \(\angle LPN\) is the inscribed angle, noted as \((5x + 12)^\circ\).

The objective is to determine the measure of arc \(\overset{\frown}{LN}\).

**Solution Steps:**

1. **Identify Relationship Between Central and Inscribed Angles:**

   In a circle, the measure of an inscribed angle is half the measure of the intercepted arc or its corresponding central angle. Therefore, the relationship between the angles is given by:
   \[
   \angle LPN = \frac{1}{2} \angle LMN
   \]

2. **Substitute Given Angle Measures:**
   \[
   5x + 12 = \frac{1}{2}(14x - 48)
   \]

3. **Solve the Equation:**

    Multiply both sides of the equation by 2 to eliminate the fraction:
    \[
    2(5x + 12) = 14x - 48
    \]

    Expand and simplify:
    \[
    10x + 24 = 14x - 48
    \]

    Rearrange the equation to isolate \(x\):
    \[
    24 + 48 = 14x - 10x
    \]

    \[
    72 = 4x
    \]

    \[
    x = 18
    \]

4. **Determine the Measure of the Central Angle:**

   Substitute \(x = 18\) back into the expression for \(\angle LMN\):
   \[
   \
Transcribed Image Text:### Geometry Problem: Central and Inscribed Angles **Problem Statement:** 5. In circle \(M\), the central angle \(\angle LMN\) measures \((14x - 48)^\circ\) and the inscribed angle \(\angle LPN\) measures \((5x + 12)^\circ\). What is the measure of arc \(\overset{\frown}{LN}\) in degrees? **Illustration Description:** The image depicts a diagram of a circle with center \(M\). Points \(L\), \(N\), and \(P\) are located on the circumference of the circle, creating two angles: - \(\angle LMN\) is the central angle, indicated as \((14x - 48)^\circ\). - \(\angle LPN\) is the inscribed angle, noted as \((5x + 12)^\circ\). The objective is to determine the measure of arc \(\overset{\frown}{LN}\). **Solution Steps:** 1. **Identify Relationship Between Central and Inscribed Angles:** In a circle, the measure of an inscribed angle is half the measure of the intercepted arc or its corresponding central angle. Therefore, the relationship between the angles is given by: \[ \angle LPN = \frac{1}{2} \angle LMN \] 2. **Substitute Given Angle Measures:** \[ 5x + 12 = \frac{1}{2}(14x - 48) \] 3. **Solve the Equation:** Multiply both sides of the equation by 2 to eliminate the fraction: \[ 2(5x + 12) = 14x - 48 \] Expand and simplify: \[ 10x + 24 = 14x - 48 \] Rearrange the equation to isolate \(x\): \[ 24 + 48 = 14x - 10x \] \[ 72 = 4x \] \[ x = 18 \] 4. **Determine the Measure of the Central Angle:** Substitute \(x = 18\) back into the expression for \(\angle LMN\): \[ \
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