A secant line intersects a curve at least two distinct points
The length of PJ is 21
The given parameters are:
PL = 6
LK = 8
PM = 4
Because the lines are secants, it means that:
PL * PK = PM * PJ
Where
PK = PL + LK
So, we have:
PK = 6 + 8
PK = 14
This gives
PL * PK = PM * PJ
6 * 14 = 4 * PJ
Divide both sides by 4
21 = PJ
Rewrite as:
PJ = 21
Hence, the length of PJ is 21
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