# Help I'm a noob

#### Disgustedmath

##### New member
How did they get the A=3.14•.6.25 squared I know how they got the rest of them but just need to know how they got that 1

#### Attachments

• 1.8 MB Views: 10

#### Disgustedmath

##### New member
How did they get the A=3.14•.6.25 squared I know how they got the rest of them but just need to know how they got that 1
And the 4 squared?

#### Dr.Peterson

##### Elite Member
Pi is approximated by 3.14.

The radius is half of the diameter, so if diameter is 8, radius is 4. If diameter is 1.25, radius is 1.25/2 = 0.625.

#### HallsofIvy

##### Elite Member
Where did you get that paper? Apparently whoever wrote that did not know that the proper transliteration of the Greek letter, $$\displaystyle \pi$$, is "pi", not "pie"!