Wednesday, March 26, 2008

Coordinate Geometry

Geometry - Coordinate Geometry:

check out this website:

B(x1, y1) and A (x2, y2) is from the
Pythagorean Theorem which is:

c2 = a2 + b2

since a = (x2 – x1) and b = (y2 – y1)

we get

c2 = (x2 – x1)2 + (y2 – y1)2
so taking the square root of both sides we have our distance formula.

Here are the Slope Formula and the Midpoint Formula:

Using the following chart, if we have to prove congruent segments, we have to show they have equal length by using the distance formula.

Here is a web-site to hopefully help: