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1. Print "Hello, World!"2. Add Two Numbers3. Swap Two Variables4. Find ASCII Value of a Character5. Check Even or Odd6. Find Largest of Two Numbers7. Find Largest of Three Numbers8. Check Positive, Negative, or Zero9. Convert Kilometers to Miles10. Convert Celsius to Fahrenheit11. Calculate Area of a Triangle12. Calculate Simple Interest13. Calculate Compound Interest14. Calculate Square Root15. Convert Seconds to Hours, Minutes, and Seconds16. Calculate Body Mass Index (BMI)17. Check Leap Year18. Find Absolute Value19. Calculate Age from Birth Year20. Sum of First N Natural Numbers21. Calculate Power Without Using pow()22. Print Multiplication Table23. Convert Decimal to Binary24. Convert Binary to Decimal25. Calculate Electricity Bill

Calculate Area of a Triangle in Python

0.5 * base * height. Height means perpendicular height, not a slanty side.

BeginnerBasic Python ProgramsExample 11 of 25
calculate-area-of-a-triangle.py
1# Program to calculate the area of a triangle
2

3base = float(input("Enter the base of the triangle: "))
4height = float(input("Enter the height of the triangle: "))
5

6area = 0.5 * base * height
7

8print("The area of the triangle is:", area)

Output

Enter the base of the triangle: 10
Enter the height of the triangle: 5
The area of the triangle is: 25.0

In this one

  • 0.5 * base * height
  • 1//2 is 0 — don't integer-divide the half

What's going on

Area = ½ × base × height. 0.5 * base * height.

Height is the perpendicular one. Plug in a side length by accident and the number is still a number, just the wrong area. The program cannot save you from that.

1/2 * base * height also works in Python 3. 1//2 is 0. Don't.

After this program

If the idea is still fuzzy, read Day 1: Introduction to Python in the Python course. For a short check, try the Python quiz (300 questions). Stay with all 25 basic python programs, or see every topic on Python exercises.

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