Question

Find the value of X​

Answer 1

20

Explanation:

The small lines show that the segments are congruent so if one segment is 10, so is the other.

Answer 2

We know that the chord with one known measure of 10 is congruent to the entire chord of X since the chords within a circle are congruent.

And since there are two congruent line marks, we must add 10 + 10 to get the entire chord. This gets us 20. Therefor, the chords within the circle are 20. Thus, X is equal to 20.