Can you measure the length of a LINE? Why?
No, lines have infinite length. They never end.
Can you measure the length of a LINE SEGMENT?
Yes, because it has two endpoints you can measure the distance between those two points.
The Distance Formula: The distance between points (x1,y1) and (x2,y2) is given by the formula Note: This is really the Pythagorean Theorem in a different form.
What distance did you get above? Find the distance by hand to check your answer from Geogebra. Use the fx menu at the left to type in your work.
To find the midpoint of a segment on a coordinate plane, find the average of your x and an average of your y values.
What were the coordinates of the midpoint you calculated above? Find the midpoint by hand and show your work using the fx menu.
Show the work to justify the answers Geogebra gave you below.