2E.11 7th edition

[Hailey Boehm 2H]

2E.11 asks you to "use lewis structures and the VSEPR model to give the VSEPR formula for each of the following species and predict its shape"
part d asks you to do this for Xenon Trioxide, XeO3.
Why is the correct molecular geometry trigonal pyramidal? What would this look like?

[Chem_Mod]

There are three oxygen atoms. Each oxygen atom is double bonded to the xenon. Because xenon has 8 valence electrons, one lone pair lies on the xenon central atom. Thus, there are four groups around, making it have a tetrahedral electron geometry. However, because of that one lone pair, it's molecular geometry is trigonal pyramidal.