The Measurement tool is extremely useful in verifying your model
Distance between entities/features
Length of selected entities
Radius/Diameter of Arcs
Surface area/perimeter of a Surface
Menu Bar→Tools→Evaluate→Measure
You may need to expand the Dialog Box to see your measurements/selections. Make sure the Blue Box is selected to Measure
LMB The "inmm" button to select units/precision
The Arc/Circle tool will toggle different options of measuring between Arcs
Center to Center is most common but Min/Max is also useful
This also works when measuring a single Arc against a Line etc.
RMB Blue Box→Clear to reset measurements
Close Dialog Box to exit Measurement
Mass Properties will provide you generic information about the part
Options will give you control over units/precision
Mass is a calculation based on Volume and the Density as defined by the Material Type
By default, there is no Material Type so your Mass calculation is imaginary
Volume is a measurement of the given Model and is used in VOL assignments
The rest of the information has specialized usefulness for Advanced Users
To determine the area contained in the valid-regions of the current sketch, use the
Tools→Evalulate→Section Properties
NOTE: If the sketch isn't a valid profile then Section Properties may provide an error