Posted by Anna on Tuesday, January 8, 2013 at 9:10pm.
The coordinates for a rhombus are given as (2a, 0), (0, 2b), (–2a, 0), and (0, –2b). Write a plan to prove that the midpoints of the sides of a rhombus determine a rectangle using coordinate geometry. Be sure to include the formulas.

geometry  Bobé Phett, Tuesday, January 15, 2013 at 11:38am
Using the diagram and connecting the dots. The top horizontal line segment is y=b and the segment is the distance of the endpoints which is a(a) = 2a, the same goes for the bottom horizontal segment. The bottom is y=b The vertical segments on the left and right would be x=a (left side) and x=a on the right. The distance from the endpoints is b(b)=2b
So the rectangle formed has the dimensions of 2a X 2b
Since the lines are horizontal and vertical they form 90 degrees angles where they intersect. A characteristic of rectangle.
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