Select the correct answer from each drop-down menu.
point a is the center of this circle.
the ratio of the lengths of and is 2: 1
first choices : ( ef, bc )
second choice ( ad, ih )

Ratio of IH to AD would be 2:1.

Step-by-step explanation:

We have been given that graph of a circle, where point A is the center of the circle. We are asked to fill in the given blank using our given diagram.

We know that the line segment joining two endpoints on circumference of circle is known as chord of the circle. BC i chord of our given circle.

A chord that passes through the center of the circle is known as diameter of he circle. Chords IH and EF are diameters of our given circle.

We know that the line segment that joins the center of a circle to any point on the circumference of circle is known as radius of circle. AD is radius for our given circle.

We also know that the measure of diameter is twice the measure of radius. This means that ratio of diameter to radius is 2 to 1.  

Since IH is diameter and AD is radius, therefore, ratio of IH to AD would be 2:1.