Question

What is the area of the circle if XY = 5.4 mm?

Answer 1

the answer would be 7.29π mm² because what you would do is

you would first divide 5.4 by two in order to get what the radius is

then you would multiply 2.7 times 2.7 in order to get 7.29

the reason that this is correct is because you have to make sure that you plug in the right values in the formula

Answer 2

The correct answer would be 22.9^2 mm.

Since area of a circle is 'A = piR^2'. 

We don't have the radius (from the middle out) but we do have the diameter (from one point to the other). We can divide this by 2 to find the radius.

5.4/2 = 2.7. 

The radius is 2.7.
A = 3.14(2.7^2)
A = 22.8