Extrude the top profile to the height of the bottom profile. When done make a cut using the diagonal height of the bottom profile.
The 3.00 dimension is unclear in the bottom view.
Do I get the points too? 
Hello Jean Wandi
in generall there are many ways... l will show you one of them:
Generall modeling rule:
- more simply features are better than one complex (and complicated)
- use constrains instead of adding dimmensions in sketcher
- 3D model is "know-how" keeper --> all important dimmensions have to be included here --> 2D drawing IS ONLY DERIVATION of 3D model
1. General shape
2. Extrude - remove material
3. Chamfer edge
Hope it can helps
Regards
Done in 2 extrude features.
Extrude #1 in sketcher view before extrude.
Extrude #1 in model view after extrude (just to show how it is dimensioned from the sketch).
Extrude #2 in sketcher view before extrude
Extrude #2 in model view after extrude (just to show how it is dimensioned from the sketch).
And finally a pic of the model tree with final model
