Coordinate of point A: Calculating this point is the most laborious. Find the first three sides of a triangle: 25, 45 and 60. Then calculate the angle of the triangle at the origin: 22. 196. 30 +22. 196 =52. 196 .？ Then calculate the coordinates of point A as: (27.583,? 35.555)? -(There is no need to mark marks on the engineering drawing. )
Coordinates of point B: This point is easy to calculate. The abscissa given by the title is 15. The ordinate is calculated as follows:
√(35 & amp； sup2- 15 & amp； Sup2) =3 1.623. So, the coordinates of point B are:? ( 15,? 3 1.623)
C point coordinates: the coordinates of this point have been given as:? (35,? 15)
Point d coordinates: symmetrical with point c? (35,? 15)? -(There is no need to mark marks on the engineering drawing. )
E-point coordinates: It is not difficult to do some triangle calculation. In this way, the coordinates of point E are: (38.646,? 46.702? )
F point coordinates: same as above. F point coordinates: (59.652,? 22. 127? )
Good wishes!