Lin measured the diameter of a circle in two different directions. Measuring vertically, she got 3.5 cm, and measuring horizontally, she got 3.6 cm. Which of the following are possible reasons why these measurements differ?
Select all that apply.
A. These measurements could be rounded, not exact
B. The diameter of a circle can vary when measured from different points
C. The thickness of the circle could have affected the measurements
D. Lin did not measure across the widest part when measuring vertically
E. The shape is not quite a circle, because a perfect circle is very hard to draw
What do I choose?