No. If you do 6+1/3 and 24+1/3 it is not equal.
The answer is 15
these chords are congruent because the radius of the circle are perpendicular to the them
so we can find EF by making an equation:

so EF is = 3(15)+5=50
good luck
Simplify each side in order to determine if true.
the answer is: False