This video is for the redesigned SAT which is for you if you are taking the SAT in March 2016 and beyond.
How to find the length of a line segment in a circle?
Additional Topics in Math
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The semicircle above has a radius of r inches, and chord CD is parallel to the diameter AB. If the length of CD is 2/3 of the length of AB, what is the distance between the chord and the diameter in terms of r?
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