1. ©2009 G Dear – Not to be sold/Free to use
Stage 4
Years 7 & 8
Angles
Points & Lines.
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©2009 G Dear – Not to be sold/Free to use

2. Points P A point has position but no size.
A capital letter (e.g. P) is used to name a point.
Collinear points lie on the same line. C B A
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3. Lines Line c A B A line has an infinite number of points.
It goes forever in both directions.
It is named by two points in upper case. (e.g. AB)
It may also be named with a single lower case letter (e.g. c)
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4. Lines 2. Interval M B A An interval is a part of a line.
It has a definite start and an end.
It is named by its end points. (e.g. AB)
The midpoint (M) lies halfway between the end points.
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5. Lines 3. Ray B A A ray is a part of a line.
It goes forever in one direction.
It has a start point but no end point.
It is named by an end point and another point using upper case letters. (e.g. AB)
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6. Three or more lines intersect at the same point.
Concurrent Lines
Three or more lines intersect at the same point. m
Concurrent
point
Exercise 9.1 (page 313) p n
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