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There are 5 lines in a cinquain. 1st line: 1 word title (noun), 2nd line: 2 descriptive words (adjectives), 3rd line: 3 words that express action, 4th line: 2 words that express feeling, last line: 1 word (synonyms or reference to title in line 1)! Hope thins works! :)
There are only two subsets of a line in a geometry: segment and ray. Line is an infinite set of points. Segment is a part of a line from one point to another. Ray starts at one point of a line and goes on indefinitely in one direction. source: Next Century Mathematics (3rd year high school) by Mercado, Suzara and Orines. Published by Phoenix Publishing House, INc. 2003
If you have two parallel lines, then they have the same slope. If you have another line, in the same plane as the first two lines, and it is not parallel to them, then the angle of intersection with the first line will be the same as the angle of intersection with the second line. If this angle is 90°, then the third line is perpendicular to the first line and also to the second line. For an example, think of a rectangle. Two opposite sides are parallel. Now pick one of the 3rd or 4th sides. Each of these sides is perpendicular to both the first side and the second side.
Input straight line joining mid -point of any two sides of triangle is parallel to the 3rd side and equal to half of it.