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Maths Puzzle
Numerical Ability
a line passes through a(1,-3) and b(2,7)
write the equation of a line perpendicular to a. how would you go about solving this problem?
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book Other Question
Please do you have a simple formula for finding the centre of a 2 dimensinal circle if I know 3 points on this circle?
7 squared - 5 squared
_______over__________
5 cubed
this is a fraction.