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Coordinates of the point on the Y-axis in the same distance from the two points in the coordinate space

ÀÛ¼ºÀÚ Uploader : billy ÀÛ¼ºÀÏ Upload Date: 2019-11-19º¯°æÀÏ Update Date: 2020-02-26Á¶È¸¼ö View : 284

The coordinates of the points on the Y-axis in the same distance from two points A(xa, ya, za), B(xb, yb, zb)

If the coordinates of the point on the Y-axis are (y, 0, 0), since it is in the same distance from points A and B, we get :

xa^2 + (ya-y)^2 + za^2 = xb^2 + (yb-y)^2 + zb^2

Re-arranging the above, the value of y can be obtained as follows.

(ya-y)^2 - (yb-y)^2 = xb^2 + zb^2 - xa^2 - za^2

ya^2 - 2ya*y + y^2 - yb^2 + 2yb*y - y^2 = xb^2 + zb^2 - xa^2 - za^2

y*(2yb-2ya) = xb^2 + yb^2 + zb^2 - xa^2 - ya^2 - za^2

y = (xa^2 + ya^2 + za^2 - xb^2 - yb^2 - zb^2)/(2ya - 2yb)

*** Âü°í¹®Çå[References] ***

y = (xa^2 + ya^2 + za^2 - xb^2 - yb^2 - zb^2)/(2*ya - 2*yb)
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