1. What is the Semi Circle Formula?

The semi circle area formula calculates the area of a half circle, which is exactly half the area of a full circle with the same radius.

2. How Does the Calculator Work?

The calculator uses the semi circle area formula:

Where:

• \( \pi \) — Mathematical constant (approximately 3.14159)
• \( Radius \) — The radius of the semi circle

Explanation: The formula calculates half the area of a full circle, making it perfect for determining the area of semi-circular shapes.

3. Importance of Semi Circle Area Calculation

Details: Calculating semi circle area is essential in architecture, engineering, and various design fields where semi-circular elements are used.

4. Using the Calculator

Tips: Enter the radius value in the appropriate unit. The radius must be a positive number greater than zero.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between a circle and semi circle area?
A: A semi circle has exactly half the area of a full circle with the same radius.

Q2: Can I use diameter instead of radius?
A: Yes, but you'll need to divide the diameter by 2 first to get the radius value.

Q3: What are common applications of semi circle calculations?
A: Architecture (arches, windows), engineering (tunnels, bridges), and various design fields.

Q4: How precise is the calculation?
A: The calculator uses PHP's built-in M_PI constant which provides high precision for π.

Q5: Can this calculator handle different units?
A: Yes, as long as you use consistent units for both input and output measurements.