Hi @Cybercrypt13 Welcome to the Forum😎
You obviously know some of this, everything is included for the benefit of those less used to S3D.
Tools > Sketch > Circle > to create the ‘Plate’
If you do this using the Z Axis as the centre it will avoid the need to add an Axis later.
From the Centre of that Circle Sketch a second Circle representing the intended Pitch Diameter of the Bolt Holes. Alternatively Sketch a Bolt Hole, centred on the Grid, as shown:
Transform > Rotate around axis > select the Bolt Hole > Next > select the Z Axis:
Hit the little + Icon > move the Double Arrow in this case 120º > Done:
Repeat again for the third Bolt Hole:
When it is not convenient to use an existing Axis learn how to Add > Construction Axis in the manner appropriate to your requirements.
Happy S3Ding .