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Use the Segment Addition Postulate.
2.6
Consider the given diagram.
To find CK we will use the Segment Addition Postulate. We are given that BC= 5.4 units. We also know that ⊙ K has a radius of 8 units, so we know that BK= 8. We can use this information to find the length of CK.
BC= 5.4, BK= 8
LHS-5.4=RHS-5.4
We have found that CK=2.6 units.