Current location - Trademark Inquiry Complete Network - Futures platform - For example, there is a village outside the L highway, and there are three routes from pp to the L highway. pa pb pc, pb's vertical foot is point B, and PA is known.
For example, there is a village outside the L highway, and there are three routes from pp to the L highway. pa pb pc, pb's vertical foot is point B, and PA is known.
(1) Pb is a vertical segment with the shortest length, which is correct;

② The length of line segment PB is called the distance from point P to line L, and this definition is correct;

③ The length of straight line AB is the distance from point A to PB, which conforms to the definition of the distance from point to straight line and is correct;

④ The length of line segment AC is the distance from point A to PC, which does not conform to the definition of the distance from point to straight line.

So choose C.

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