1) The vertex A if a square ABCD is at the point (6, -4 ) . The diagnol BD has equation 2y-x=6, and the vertex B is nearer to the origin than D.

a)calculate the coordinates of the centre of the square.

b)calculate the coordinates of B and C.

 

2) Calculate the coordinates of the centre of the circle that pass through (0,2) , (4,8) and the origin O.

 

I attempted 1a and 2 and got random answers... which were not on the answers page. I couldn't do b. pls can someone show me the actual working as i can figure the answer on the answers page anyways i need to know how to work these out - they're hard :/

So have you drawn a diagram from the information given?

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So chemistry student would you explain where you have got to in solving this problem and what has stopped your progress - hopefully members can then help you to overcome your difficulties yourself.

 

 

And as always - draw a diagram per Studiot above, best advice to starting almost any question

 

And as always - draw a diagram per Studiot above, best advice to starting almost any question

 

 

 

In this case it is particularly important since the square is not parallel to the x and y axes.

 

 

In this case it is particularly important since the square is not parallel to the x and y axes.

 

I ran through the question and the route to an answer leaps out whilst you are drawing the diagram. Sometimes the diagram just helps you get your thoughts organised and the "givens" properly written out (as a minimum - but a crucial minimum) - but in other circumstances it is almost the solution as well as a re-writing of the question