31
Line segment. Broken line
Textbook Part 1, pp. 64–65
GoalTell a segment from a line; recognise a broken line.
New words
line segment · kesmaendpoints · kesmaning oxirlaribroken line (polyline) · siniq chiziqlink / piece · bo‘g‘in
Explanation
The part of a straight line between two points is called a segment. A segment has a start and an end — its endpoints. We call a segment AB. Segments joined end to end make a broken line. Each segment is a link of the broken line.
Worked examples
A •————• B — this is segment AB.
A zigzag ╱╲╱╲ is a broken line with 4 links.
Class activity
Children mark 3 points (A, B, C), join them one after another and say how many segments they made.
Practice
1
Three points A, B, C are marked on a line. How many segments are there?
3: AB, BC, AC
2
How many endpoints does a segment have?
2
3
A broken line has 5 links. How many segments is it made of?
5
4
Calculate along the broken line: 3 → +4 → −2 → +5
10