
(a)
To find: the number of line segments between three non collinear points.
(a)

Answer to Problem 19WE
3
Explanation of Solution
Given information:
State how many segments can be drawn between the points in each figure. No three points are collinear.
Formula used:
Property of line segment.
Calculation:
From figure, there are 3 segments
Hence, the answer is 3
Conclusion:
The answer is 3
(b)
To find: the number of line segments between four non collinear points.
(b)

Answer to Problem 19WE
6
Explanation of Solution
Given information:
State how many segments can be drawn between the points in each figure. No three points are collinear.
Formula used:
Property of line segment.
Calculation:
From figure, there are 6 segments
Hence, the answer is 6
Conclusion:
The answer is 6
(c)
To find: the number of line segments between five non collinear points.
(c)

Answer to Problem 19WE
The answer is 10
Explanation of Solution
Given information:
State how many segments can be drawn between the points in each figure. No three points are collinear.
Formula used:
Property of line segment
Calculation:
From figure, there are 10 segments
Hence, the answer is 10
Conclusion:
The answer is 10
(d)
To find: the number of line segments between six non collinear points.
(d)

Answer to Problem 19WE
The answer is 15
Explanation of Solution
Given information:
State how many segments can be drawn between the points in each figure. No three points are collinear.
Formula used:
Property of line segments
Calculation:
From figure, there are 15 segments
Hence, the answer is 15
Conclusion:
The answer is 15
(e)
To find: The number of segments that are determined using the seven points.
(e)

Answer to Problem 19WE
21
Explanation of Solution
Given information:
State how many segments can be drawn between the points in each figure. No three points are collinear.
Formula used:
Calculation:
From above the general formula for number of segments for n points can be calculated as
Therefore, the number of segments for 7 points is
Hence, the answer is 21
Conclusion:
(f)
The segments between n points.
(f)

Answer to Problem 19WE
Explanation of Solution
Given information:
State how many segments can be drawn between the points in each figure. No three points are collinear.
Formula used:
Calculation:
The general formula for number of segments for n points can be calculated as
Hence, the answer is
Conclusion:
Chapter 1 Solutions
McDougal Littell Jurgensen Geometry: Student Edition Geometry
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