3D Printed Dome on Onshape

all you need is a computer and a mouse

Click the plane labeled top and then click the sketch button. Click the circle and draw a circle on the plain.

Select the edge of the circle and hit the extrude button to extrude.

*Don’t extrude the whole circle, just the edge

Hit the sketch button and select the right plain. Select point and add one directly above the center of the circle.

Select this icon to put the point in the right place

Make another sketch on the right plane and select three point arc

Make the points of your arc line up with the one you added, the middle of the circle, and the edge of the circle

make a line connecting the canter of the circle and the point in the center of the arc

select the arc and then hit the revolve button to revoke it

Select the whole dome and hit the thicken button to thicken it