Question

Find the area of a semi circle when the radius is 10cm.
give the answer in term of pi

Answer 1

3.14195 is pi sooooo yea that’s pi

Answer 2

A = 50π cm²

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

1. Brackets
2. Parenthesis
3. Exponents
4. Multiplication
5. Division
6. Addition
7. Subtraction

• Left to Right

Geometry

Area of a Circle: A = πr²

• r is radius

Explanation:

*Note: A semicircle is half a full circle.

Step 1: Define

Radius r = 10 cm

Step 2: Solve for A

1. Rewrite Area of Circle Formula: A = 0.5πr²
2. Substitute in r [Area of Semicircle Formula]: A = 0.5π(10 cm)²
3. [Area] Evaluate exponents: A = 0.5π(100 cm²)
4. [Area] Multiply: A = 50π cm²