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Coordinate Geometry II TRIANGLES

by aek
Tags: coordinate, geometry, triangles
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Mar14-05, 08:03 PM
P: 82
The question is in the attached picture.

i can't seem to find a relevant formula and when i do i can't get a suitable answer, if some one can help, i'll highly appreciate it. Thanks in advance.
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Pseudo Statistic
Mar18-05, 03:04 PM
P: 390
a) It wants the equation of SD, as it looks to me...
You see that it hits D right in the middle of AC, so find the midpoint of AC.
Then, you have the co-ordinate S(0,-2) and that midpoint, do y-y1 = m(x-x1)

b) ... Should be x - y = -2 according to the graph given.

c) ...the co-ordinates are already given?

d) Similar method to a)

e) Pretty much find the distance between each of these points and S and prove that to be the radius of the circle. (radius should be square root 40)

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