Summary (Grade 11 NSC Matric Mathematics): Flashcards

Flat surface space within boundaries of a 2D shape

Square units (cm², m², km²)

$A = \frac{1}{2}b \times h$

$A = \pi r^2$

Total area of all exposed outer surfaces of a 3D object

Unfolded flat pattern of a 3D solid

Amount of 3D space occupied by an object

$V = \pi r^2 \times h$

One-third of base area times perpendicular height

$V = \frac{4}{3}\pi r^3$