Question

In the image, point A marks the center of the circle. Which two lengths must form a ratio of 2:1?

Answer 1

Draw a diameter through the center of the circle.  Any radius of this circle is 1/2 the length of the diameter.  Thus, if we divide the diameter into two equal parts, we have two lengths that form the ratio 2:1, where 2 represents the diameter and 1 the radius.

Answer 2

Answer:

EF:AI

Step-by-step explanation:

E to F is double that of AI and it needs to be in the front since it is 2:1, not 1:2. Best of luck with the rest.