  No part of this publication may be reproduced, or transmitted, or stored, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SheetMetalWorkBook.com, Sixth Edition Reformatted for Internet, ©2012 SheetMetalWorkBook.com   Please Donate if you find this site helpful. Thank-You!
Coordinate Systems
CARTESIAN COORDINATES:
EITHER ONE OR TWO INTERSECTING LINES WHICH DETERMINE THE POSITION OF EVERY POINT IN A PLANE. X & Y IDENTIFY THE AXIS. X IS NORMALLY HORIZONTAL AND Y IS VERTICAL. (ALSO CALLED RECTANGULAR COORDINATES.
1  2  3  4  5
-5 -4 -3 -2 -1
5 4 3 2 1
-1 -2 -3 -4 -5
2 DIMENSIONAL OR 2 AXIS (FLAT PLANE)
(Y AXIS)
(X AXIS)
(2,1)
(3,2.5)
(4,3)
ORIGIN IS 0,0 X DIMENSION IS FIRST     WHEN DEFINING POINTS
IF YOU MIRROR THESE POINTS AROUND THE Y AXIS THEN THE VALUE OF X IS CHANGED TO NEGATIVE NUMBERS
3 DIMENSIONAL OR 3 AXIS (COORDINATES IN SPACE)
(Y AXIS)
(X AXIS)
(Z AXIS)
ORIGIN IS 0,0
3 2 1
-1 -2 -3
-3  -2  -1
1   2   3
3       2   1
-1       -2   -3 YOU COULD DETERMINE THE RECTANGULAR COORDINATES FROM POLAR COORDINATES BY USING TRIGONOMETRY TO WORK OUT THE PROBLEM.
WHERE AN ANGLE & DISTANCE (RADIUS) DETERMINES THE POSITION OF A POINT
sin(30) x 1.500 = Y VALUE cos(30) x 1.500 = X VALUE
POLAR COORDINATE
(Y AXIS)
(X AXIS)     30°  