1. What is a Semi Circle?

A semi circle is a two-dimensional geometric shape that represents half of a circle. It is formed by cutting a whole circle along its diameter, resulting in a shape with a curved edge (the arc) and a straight edge (the diameter).

2. How Does the Calculator Work?

The calculator uses the semi circle formulas:

Where:

• \( r \) — Radius of the semi circle (m)
• \( \pi \) — Mathematical constant approximately equal to 3.14159

Explanation: The area is exactly half of a full circle's area, while the perimeter includes half of the circle's circumference plus the diameter length.

3. Importance of Semi Circle Calculations

Details: Semi circle calculations are essential in architecture, engineering, and various design fields where curved structures are used. They help in determining material requirements, structural integrity, and aesthetic proportions.

4. Using the Calculator

Tips: Enter the radius value in meters. The radius must be a positive number greater than zero. The calculator will automatically compute both area and perimeter.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between semi circle and hemisphere?
A: A semi circle is a 2D shape (half circle), while a hemisphere is a 3D shape (half sphere).

Q2: Can I use different units besides meters?
A: Yes, but ensure all measurements use the same unit system for consistency.

Q3: How accurate are the calculations?
A: The calculations use precise mathematical formulas with π accurate to system precision.

Q4: What if I have the diameter instead of radius?
A: Simply divide the diameter by 2 to get the radius before entering the value.

Q5: Are these formulas valid for all semi circles?
A: Yes, these formulas apply to all perfect semi circles regardless of size.