STEP 1) First you want to start out with a square that is 1" X 1". Using ether the rectangle future in Inventor or the line future.
Step 2) Second you go and select finish step and use the extrude future to make your sketch 3D. When selecting the extrude future you want to demotion the extortion to 3/4 of an inch.
Step 3) Then you edit the face on the extortion and make a new sketch that is flush with the bottom and the sides of you square and make the new sketch 1" X 1/4 of an inch.
Step 4) Then you will use the extrude that section out to .75" To complete a full inch on both edges that have been extruded.
Step 5) Then you will demotion a .25" X .75" rectangle on the front side of the widget.