# Math 10 Week 14

This week we learned how to find the length of of a line segment. This takes place in graphing. It is from one coordinate to another.

ex. Say the coordinates are x1 and y1 (2, -10) and (4,8) x2 and y2

To find the length of a line segment you need to use the formula of $(x1-x2) ^2$ + $(y1-y2) ^2$ = $C^2$

$(2-4)^2$ + $(-10 - 8)^2$$C^2$

$-2^2$$-18^2$$C^2$

You are doing this step because of pythagoras

4 + 324 = $C^2$

$\sqrt{328}$ = $C^2$

The length of the line segment is roughly 18.1