Areas of maths in detail?

[nadkha]

My Dd will be sitting the Whgs and nonsuch exams.

Would she need to know about pi?

Is there anywhere that i could find out in some detail the areas in maths that need to be covered?

[parent2013]

Area of standard shapes: square, rectangle, circle and triangle
Area of irregular shapes: these are much harder and require slice/dice to get the area

Pi is 3.14 or 22/7 (sometimes it is provided in the questions).