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Midpoint of a Line
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Coordinates
I will be using Cartesian Coordinates, where you mark a point on a graph by how far along and how far up it is. |
Example: The point (12,5) is
12 units along, and 5 units up. |
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Midpoint of a Line
The midpoint is halfway between two points.
So all you have to do is ...
... calculate the average x and average y of the two end points:
- Add both "x" coordinates, divide by 2
- Add both "y" coordinates, divide by 2
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And this is what you get:
| M = ( |
xA+xB |
, |
yA+yB |
) |
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| 2 |
2 |
Example: What is the midpoint here?
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| M = ( |
xA+xB |
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yA+yB |
) |
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| 2 |
2 |
| M = ( |
-3+8 |
, |
5+(-1) |
) |
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| 2 |
2 |
M = ( 5/2, 4/2 )
M = ( 2.5, 2 ) |
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