Formulae for 3D objects Flashcards
1
Q
pyramid volume
A
1/3 x base area x perpendicular height
2
Q
pyramid surface area
A
base area + other sides (use pythagoras)
3
Q
cone volume
A
1/3 x π x radius² x height
4
Q
cone curved surface area
A
π x radius x slant height
5
Q
frustrum volume
A
find volume of missing part and subtract from a whole cone - the triangles will be similar
6
Q
sphere volume
A
4/3 x π x radius³
7
Q
sphere surface area
A
4 x π x radius²
