Question

What is the missing length to the nearest tenth?

Answer 1

Answer: 3.6

We have a diameter of 12 so a radius of 6.

The chord makes a right angle with a different diameter, which bisects the chord, so each piece is 4.8.

x is the remaining leg.    Let's write 4.8=4(1.2) and  6=5(1.2) so this is a  3/4/5 right triangle, x= 3(1.2) = 3.6