Assertion: semicircle's radius | /r/HasProperty | calculated as #6mm#
Facets:
Source sentences:
text: #A_C=pir_C^2# , where #A_C=# Area of circle, and #r_C^2=# radius of circle, calculated as #6mm# (since the radius of the semicircle forms the diameter of the circle, as can be seen in the diagram).