The midpoint is the center, or middle, of a line segment. The formula is [math]\left(\frac{X2+X1}{2},\frac{Y2+Y1}{2}\right)[/math]

To find the midpoint using the formula, put the x-coordinate for point B in place of [math]X2[/math] and the y-coordinate for point B in place of [math]Y2[/math]. Put the x-coordinate for point A in place of [math]X1[/math] and the y-coordinate for point A in place of [math]Y1[/math]. Now you should have [math]\left(\frac{4+1}{2},\frac{5+1}{2}\right)[/math]. Add the numbers to get [math]\left(\frac{5}{2},\frac{6}{2}\right)[/math]. Divide to have the answer, [math]\left(2.5,3\right)[/math].

To find the midpoint using Geogebra, click on the point icon and scroll down until you see "midpoint or center". After that, click on the two points or the segment. Point C is the midpoint.