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Mathematics 11 Online
OpenStudy (anonymous):

Find the length of the line segment joining the midpoints of the segments AB and CD, where A=(1,3),B=(2,6),C=(4,7) and D=(3,4).

OpenStudy (anonymous):

First: find the coordinates of the midpoints of AB and CD The midpoint of AB is (0.5,4.5) The midpoint of CD is (3.5,6.5) Second: use the distance formula to find the distance between the midpoints The difference in X is 3 The difference in Y is 2 \[distance=\sqrt{3^2+2^2}=\sqrt{13}\]

OpenStudy (anonymous):

peter,The midpoint of AB is (0.5,4.5) how do u get that pls?

OpenStudy (anonymous):

midpoint is it not x1+x2/2which is 1.5

OpenStudy (anonymous):

and 4.5

OpenStudy (campbell_st):

and I think you'll find the midpoint of CD is incorrectly stated I think it should be (3.5, 5.5)

Directrix (directrix):

So, now is the task to find the distance between the points with coordinates (3/2 , 9/2) and (7/2 , 11/2) ? @lissafi

OpenStudy (anonymous):

oh, sorry 0.5 and 6.5 were wrong. thank you for checking my math.

OpenStudy (anonymous):

oh, sorry 0.5 and 6.5 were wrong. thank you for checking my math. The process itself is right though.

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