Answer:
13 or 12 or 10
Step-by-step explanation:
Answer:

Step-by-step explanation:

<em>Rule need to remember to solve such questions</em><em>:</em>

CL will always be the same as LD, the CD line is perpendicular to AB where the L is, so, the extreme points of CD will always be in the same distance of L.
-15 - X = -6; X = (-9); -15 + (-9) = -6