Select the edges as shown, set Distance
to 15%, and under
Options, choose Extend
edges
Select the edges as shown, and under Options, choose Extend edges.
Select edges as shown, and under Options, choose Connect endpoints.
Select the edge as shown, keep the Distance
at 15%. Under
Options, choose Extend
edges.
Select the edge as shown, change the Distance
to 30%.
Under Options, choose Extend
edges.
Select the face, and under Options, choose Internal edges.
Select the face, and under Options,
choose External edges. Set Distance to 15%.
You can also select All edges
to untrim both internal and external edges.