Fig. 23.

How To Construct The Frustum Of A Cone Form Of Fla 23

Let AJBCD represent the required frustum; continue the lines AD and BC until they meet at E; then from E as centre, with the radius EC, describe the are CH; also from E, with the radius EB, describe the are BI; make Bl equal in length to twice AGB, draw the line EI, and BCIH is the form of the plate as required.