Midpoint of a rectangle with 8 co-ordinates

Question

I am writing a javascript program to find the midpoint of the rectangle (diagonal lines which intersect in the middle) I have 8 co-ordinates (x1,y1) (x2,y2) (x3,y3) (x4,y4). How can i achieve this?

Please share complate of your codes – Ivan Barayev Nov 19 '17 at 14:33 — Ivan Barayev, Nov 19 '17 at 14:33

paper man · Answer 1 · 2017-11-19T14:57:44.453

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Just find the average of each coordinate. Because it’s a rectangle, you only need two coordinates. If x1, y1 is opposite x3, y3 then the midpoint is ((x1+x3)/2, (y1+y3)/2)

edited Nov 19 '17 at 14:57

answered Nov 19 '17 at 14:35

paper man

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Can you kindly simplify more? Here is the list of my coordinates 134.2 = x1 174.1=x2 134.2=x3 174.1 =x4 741.4=y1 741.4=y2 725.6=y3 725.6=y4 – umzee Nov 19 '17 at 14:50
@umzee ((134.2+174.1)/2, (741.4+725.6)/2) = (154.15, 733.5) – paper man Nov 19 '17 at 14:56

score 0 · Answer 2 · answered Nov 19 '17 at 14:36

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Midpoint of a triangle is the midpoint of each diagonal. So, the midpoint is:

x_mid = (x1 + x3)/2; // or (x2 + x4)/2
y_mid = (y1 + y3)/2; // or (y2 + y4)/2

answered Nov 19 '17 at 14:36

OmG

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Midpoint of a rectangle with 8 co-ordinates

2 Answers2