<h3>
Answer: 20 sides</h3>
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Work Shown:
x = exterior angle
9x = interior angle
interior + exterior = 180
9x+x = 180
10x = 180
x = 180/10
x = 18
n = number of sides
n = 360/x
n = 360/18
n = 20
There are <u>20</u> sides to the regular polygon.
Side notes:
- The formula to determine n only works for regular polygons.
- A polygon with 20 sides is known as an icosagon.
- Any pair of adjacent interior and exterior angles are supplementary. They add to 180 degrees.
Side would be 9centimeters diagonal is 12.7 centimeters
Answer:
x = 4.
Step-by-step explanation:
5x - 3.5 = 3x + 4.5
5x - 3x = 4.5 + 3.5
2x = 8
x = 4.