Circle o is shown below. the diagram is not drawn to scale? if angle r is 32, what is angle o?
a: 128
b: 64
c: 32
d: 16

We have to find the measure of angle O.
We already know that ∠R = 32°.
The measure of the inscribed angle ( here ∠ R ) is half the measure of the central angle ( here ∠ O ).
Therefore:
∠ O = 2 · 32° = 64°

B ) 64°

That they are numbers and related to each other.