Martin Turner
09/20/2024 · Senior High School
Sum of all the angles \( =(n-2) \times 180^{\circ} \). Each internal angle \( =( \) Sum of all the angles \( ) \div \mathrm{n}= \) number of sides or number of angles of a polygon] In a regular polygon with 6 sides, the sum of all the angles is and every internal angle measures In a regular polygon with 8 sides, the sum of all the angles is and every internal angle measures
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Step-by-step Solution
To find the sum of all the angles and the measure of each internal angle for regular polygons, we can use the formulas you provided.
### For a regular polygon with 6 sides (hexagon):
1. **Sum of all the angles**:
\[
\text{Sum of all angles} = (n-2) \times 180^{\circ}
\]
where \( n = 6 \):
\[
\text{Sum of all angles} = (6-2) \times 180^{\circ} = 4 \times 180^{\circ} = 720^{\circ}
\]
2. **Each internal angle**:
\[
\text{Each internal angle} = \frac{\text{Sum of all angles}}{n} = \frac{720^{\circ}}{6} = 120^{\circ}
\]
### For a regular polygon with 8 sides (octagon):
1. **Sum of all the angles**:
\[
\text{Sum of all angles} = (n-2) \times 180^{\circ}
\]
where \( n = 8 \):
\[
\text{Sum of all angles} = (8-2) \times 180^{\circ} = 6 \times 180^{\circ} = 1080^{\circ}
\]
2. **Each internal angle**:
\[
\text{Each internal angle} = \frac{\text{Sum of all angles}}{n} = \frac{1080^{\circ}}{8} = 135^{\circ}
\]
### Summary:
- In a regular polygon with 6 sides (hexagon):
- The sum of all the angles is \( 720^{\circ} \).
- Each internal angle measures \( 120^{\circ} \).
- In a regular polygon with 8 sides (octagon):
- The sum of all the angles is \( 1080^{\circ} \).
- Each internal angle measures \( 135^{\circ} \).
Quick Answer
In a regular hexagon, the sum of all the angles is 720° and each internal angle measures 120°. In a regular octagon, the sum of all the angles is 1080° and each internal angle measures 135°.
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