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Replies: 3   Last Post: Jul 31, 2008 10:57 AM

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 Yogi Posts: 323 Registered: 12/6/04
Re: I can't figure these out...
Posted: Nov 26, 2003 7:02 PM

ashley wrote:

>1. If ON=4x-5, LM=2x+4, NM=x+5, and OL=8y-7, find the values of x and
>y given that LMNO is a parallelogram.

>a)x=-1/2;y= 23/16
>b)x=2;y=-16/33
>c)x=9/2;y=33/16
>d)x=9/2;y=-16/33

What do you KNOW about parallelgrams? In particular what is true

>2.Consider the statement, "if a parallelogram is a square,then it is
>a rhombus."

>a)decide whether it is true or false.
>b)Write a converse
>c)decide whether the converse is true or false.

Do you know the definition of rhombus? Does a square fit that
definition?
Do you know what the converse of a statement is? If you don't what
could you do to find out?

>3.draw figure in a coordinate plane and write a coordinate proof
>Given: Quadrilateral ABCD with A (-5,0), B (3,-1) C(6,1), D(-2,2)
>Prove: ABCD is a parallelogram

What is the DEFINITION of parallelogram? What theorems do you know
about parallelgrams? Do you know how to find the distance between two
points given in coordinates? Do you know how to determine if two
lines through two sets of points,given in coordinates, are parallel?
i drew the figure but i dont know how to do the rest of that one.. and