Ko te toronga hohonu o te whakarewa ko te tikanga o te kuia, te kumea te mowhiti, te hangai whakarewa ranei hei whakarereke i nga mea whakarewa pereti ki roto i tetahi waahanga porotaka, pouaka ranei.
To tatou kaha:
1.Te tuhi porohita
2.Ellipse tuhi
3.Whakaahua tapawhā
4.Hill te tuhi
5.Hill te tuhi
6.Ki te tuhi flange hemisphere
7.Flange tuhi
8.Flange tuhi
9.Te tuhi hohonu
10. Taper tuhi
11. Rectangular redrawing
12.Te hanga mata
13.Step tuhi
14.Whakamuri te tuhi
15. Te rino
16.Paera tuhi