I drew Tool box and oil stone box by auto cad in class

actually picture 1 and 2 about blue print of the tool box and oil stone is same picture, I seperated it, and the right side picture3 is which i described the tool box as 3dimension.

the rectangular shape with two diagonal lines in the picture in the middle side have a role when making a tool box as both sides in it, which means i have to cut the two lines and make the shape in the right side of the rectangular shape

when making the shape in the last picture, i translated the distances in picture 1, 2 into it as it is, and to keep parallel from sides to opposit sides, i need to keep fixed angle when i draw it, i did 30 degrees

these 3pictures are drawn by me.

yesterday i learned how to make the camber, there are few ways to make it,

i know one way only, i made this camber by that way

I used trim to cut half of the circle and divided the half-circle as 8pieces by using command "divide" it help to divide it as equal parts.

the horizontal line also need to divide as 4pieces and each points has lines to intersect with the lines starting from the 3points of the circle, i have to make every lines intersected then mark 3points to draw the curved line by using command "spline"

it would be used like this

----

i made this by auto cad which i did also in the card board

in this way, i can do this easier than doing by hand

i have to make perpendicular with buttock 50, and measure the angle between them by angular.

and fix the angle to be 90 degrees by rotate. then it can be drawn.