Question

What is length of CD?

Answer 1

`24` feet

Explanation:

There is a theorem in geometry that says:

• In a circle, if two chords are equal in measure, then their corresponding minor arcs are equal in measure.

Those small tick marks on each of the chords means that they are equal in measure. So, following the theorem, the arcs are also equal in measure.

If they are equal and
`"arc AB = arc CB"`
`"arc AB = 24 feet"`

Then `"arc CB = 24 feet"` by substitution.