﻿ Python Math: Calculate the area of a regular polygon - w3resource # Python Math: Calculate the area of a regular polygon

## Python Math: Exercise-28 with Solution

Write a python program to calculate the area of a regular polygon.

Sample Solution:-

Python Code:

``````from math import tan, pi
n_sides = int(input("Input number of sides: "))
s_length = float(input("Input the length of a side: "))
p_area = n_sides * (s_length ** 2) / (4 * tan(pi / n_sides))
print("The area of the polygon is: ",p_area)
```
```

Sample Output:

```Input number of sides: 4
Input the length of a side: 20
The area of the polygon is:  400.00000000000006
```

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## Python: Tips of the Day

Python: Get the Key Whose Value Is Maximal in a Dictionary

```>>> model_scores = {'model_a': 100, 'model_z': 198, 'model_t': 150}
>>> # workaround
>>> keys, values = list(model_scores.keys()), list(model_scores.values())
>>> keys[values.index(max(values))]
'model_z'
>>> # one-line
>>> max(model_scores, key=model_scores.get)
'model_z'
```