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How many line segments are there in the parallelogram in the second grade rectangle?
Analysis:

A line segment, draw a point in the middle, this point divides the original line segment into two line segments, plus the original line segment, a ***3 line segments.

Solution:

The four vertices of the parallelogram are on the four sides of the rectangle,

① The total number of sides of a rectangle =3×4= 12.

② When the four sides of the parallelogram are added together, the total number of line segments is 12+4= 16.