You want to calculate the area of a circle with radius 7 using Python. Which code correctly uses math operations to do this?

hard📝 Application Q15 of 15

Python - Standard Library Usage

import math
radius = 7
area = ?
print(area)

Aarea = math.pi * (radius ** 2)

Barea = math.pi ** radius

Carea = pi * radius * radius

Darea = math.pi + radius ** 2

Step-by-Step Solution

Solution:

Step 1: Recall formula for circle area
The area of a circle is π times radius squared, or π * r².
Step 2: Translate formula to Python code
Use math.pi for π and radius ** 2 for radius squared, so math.pi * (radius ** 2).
Final Answer:
area = math.pi * (radius ** 2) -> Option A
Quick Check:
Area = π * r² [OK]

Quick Trick: Use ** 2 for square, multiply by math.pi [OK]

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