How do you calculate area of a circle?

Related questions

1. How was Pi originally calculated?
2. Why is 3.14 called pi?
3. Does a circle have sides?
4. Can a circle be a function?
5. What is the equation for half a circle?
6. What is the equation of a circle if the center is 0 0?
7. How do you find the Directrix?
8. What is H K in math?
9. What is the vertex of a circle?
10. Who discovered the equation of a circle?

Tags

1. #before
2. #multiply
3. #solve
4. #square
5. #divide
6. #formula
7. #itself
8. #squared
9. #simply
10. #diameter
11. #radius
12. #circle