The radius of a regular pentagon is 11 m. What is the length of its apothem?
Question
The radius of a regular pentagon is 11 m. What is the length of its apothem?
Solution
To find the length of the apothem of a regular pentagon with a given radius, we can use the formula for the apothem (a) of a regular polygon:
a = r * cos(π/n)
where:
- r is the radius of the polygon, and
- n is the number of sides of the polygon.
For a regular pentagon, n = 5.
So, the apothem a = 11m * cos(π/5).
Now, calculate the value of cos(π/5) and multiply it by 11m to get the length of the apothem.
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