One of the tests had a question on area(cross section),volume and length of a prism. Whilst they are not difficult to solve DCs(at least mine) can find the terminology (cross section) confusing.
I have not see any of these questions even in the super-selective independent school papers (including MGS, Habs, St. Pauls, etc)
Circle formula is given if there is a question involving circles but child should know what the terms diameter and radius of a circle mean and what their relation to each other is.
Parallelogram can come up but the child should be able to work out the area without knowing the formula - they can cut it into 2 triangles and a square/rectangle in the middle (compound shape made up of 2 triangles on either side of a square/rectangle). Once they can see this, working out the area is easy using rectangle and triangle formulae.