If the measure of arc AB is 64 degrees, what is the measure of angle ADB?
0 64 degrees
128 degrees
32 degrees
90 degrees

Probably 64 degrees unless you are not telling us something.

Hope this helps.

56.6

step-by-step explanation:

the ratio of the perimeters is equal to the scale.

the ratio of the areas is equal to the square of the scale.

34 / 20 = k

a / 19.6 = k²

substituting:

a / 19.6 = (34 / 20)²

a = 19.6 (34 / 20)²

a ≈ 56.6