Just for a change, this post will be about a good aspect of new Curriculum. Just kidding. Sort of.
The following is an elaboration and associated content descriptor from Year 8 Measurement:
solve problems involving the circumference and area of a circle using formulas and appropriate units (AC9M8M03)
deducing that the area of a circle is between 2 radius squares and 4 radius squares, and using 3 × radius2 as a rough estimate for the area of a circle
There are two ways one might react to this elaboration. First, one might justifiably have no idea what is the meaning or intent of the elaboration, and then conclude that the curriculum was written by idiots. Or, one could recognise that the elaboration is at least attempting something good but that the attempt was an abject failure, and then conclude that the curriculum was written by idiots. All roads lead to Rome.