Asked by dave

show that (-1,1), (9,4), (20,6) and (10,1) are the vertices of a rhombus and then find the area of this rhombus?

Answers

Answered by Reiny
no they are not

just sketch it and find the slopes of the lines, none are equal

In a rhombus opposite sides should have the same slope and they must be equal in length.
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