CBSE Math RevisionExam tip poster: Units, π and r² (CBSE Class 10 Maths)
A4 portrait. It is drawn in vector form, so it also prints sharply scaled up to A3.
The poster
The maths
A common mistake the examiners point out: Mensuration: units, π and squaring the radius. What to do instead: Write the formula, square r, use the π given, and finish with the right unit.