Python Exercise (Part I) Solutions

Solution 1.

from math import pi

radius = float(input("Enter radius of the circle : "))

calculated_area =  (pi * radius**2)

print("The area of the circle with radius",radius,"is",calculated_area)

Output :

Enter radius of the circle : 7
The area of the circle with radius 7.0 is 153.93804002589985

What if we used 22/7 (fraction value of pi) instead of pi…

radius = float(input("Enter radius of the circle : "))

calculated_area =  (22/7 * radius**2)

print("The area of the circle with radius",radius,"is",calculated_area)

Output :

Enter radius of the circle : 7
The area of the circle with radius 7.0 is 154.0

Solution 2 :

# Take input from user
width = float(input("Width of the rectangle : "))
height = float(input("Height of the rectangle : "))

#calculate Area
area = width * height 
print("Area is",width,"x",height,"=",area)

#calculate perimeter
perimeter = 2 * (width + height) 
print("Perimeter is 2 x (",width,"+",height,") =",perimeter)

Output :

Width of the rectangle : 10.5
Height of the rectangle : 7.5
Area is 10.5 x 7.5 = 78.75
Perimeter is 2 x( 10.5 + 7.5 ) = 36.0

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