Chapter 1 summary
Key Concepts
Point- Drawn as a dot, labeled as a capital letter.
Line- The letters representing 2 points on the line or a lowercase script. Does not end; ever.
Midpoint- The in-between of two points on a line. Basically the point exactly in between the two end points of a line segment.
Example of using algebra to find measures
AB-BC Definition of midpoint
4x – 5 – 11+2x AB-4x-5, BC-11+2x
4x-16+2 Add 5 to both side
2x- 16 Subtract 2x from each side
x-8 Divide each side by 2
Now substitute 8 for x in the expression for BC
BC-11+2x Original measure
-11+2(8) x-8
-11+16 or 27 The measure of BC is 27
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