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# Find the coordinates of midpoint P of segment BC. Then Calculate the lengths of...

novjb | Salutatorian

Posted July 16, 2013 at 6:29 PM via web

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Find the coordinates of midpoint P of segment BC. Then Calculate the lengths of segments AP, BP, and CP.

Is point P the circumcenter of triangle ABC?

Is point A on the perpendicular bisector of segment BC? (Always, never or sometimes)

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justaguide | College Teacher | (Level 2) Distinguished Educator

Posted July 16, 2013 at 6:41 PM (Answer #1)

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The coordinates of point B are (0, 2k) and that of point C are (2h, 0). The mid point of BC lies at P and its coordinates are `((0+2h)/2, (2k+0)/2)` = (h, k)

The length of AP is `sqrt(h^2 + k^2)` , the length of BP is `sqrt(h^2 + k^2)` , the length of CP is `sqrt(h^2 + k^2)`

The point P is the circum-center of triangle ABC.

Looking at the length of AP, PC and AC,

`AP^2 = h^2 + k^2` , `PC^2 = h^2 + k^2` and `AC = 4h^2`

Point A is on the perpendicular bisector of segment BC only when h = k.

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