Plate

I started by creating a line left horizontal 85mm. Create a line going up vertically on the right endpoint of the first line making it 465mm. Connect an angled line going left at 45 degrees and connect it with another angled line at 15 degrees. Then create a line going left horizontally at 20mm. Connect a line going down at 45mm and a line going right of it at 35mm. Then make a line going down at 345mm and connect a line with the 100mm line. I then selected the revolved and selected the bottom line of the sketch as the axis of revolution. I selected the inside if the sketch and then select the circle tool and created a circle exactly like the other circles. I created a contraction line from the origin to the mid point of the second big circle. Then I selected the offset tool and selected the add dimension, select chain, and bi-directional boxes and changed the dimension to 20mm. I selected the fillet tool and changed the dimension to 10mm selected the two bottom lines to the circle and the top right line and circle. Then I changed the dimension to 60mm and selected the top left of the line and the circle and selected the green arrow. Select the trim tool and trim the rest of the circle leaving what we fillet. Then I selected the circular pattern tool, view, hide/show, temporary axis, then select the dotted line on the middle of the sketch. I changed the number of instances to 9 and then selected the first box and selected the fillet sketch then select the green arrow.Mass = 84184.05 gramsVolume = 31179276.94 cubic millimetersSurface area = 1916449.49 square millimeters