Help I'm a noob

[Disgustedmath]

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

 

[Disgustedmath]

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?

 

[Disgustedmath]

And the 4 squared?

Where did they get 3.14

 

[Dr.Peterson]

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]

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"!