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Question: draw a line with the nearest point on a straight line, and the vertical line is the shortest! What do you mean? Be specific! thank you
It should be like this.

Of all the connecting lines between a point on a straight line and a point outside the straight line, the vertical line segment is the shortest.

Other line segments are called diagonals.

The diagonal part is larger than the vertical part.

In a right-angled triangle, it can be understood that the hypotenuse is larger than the right-angled side (the diagonal segment is the hypotenuse and the vertical segment is one of the right-angled sides).