1
Q
area of a circle
A
πr2
2
Q
perimeter of a circle
A
2πr
3
Q
surface area of sphere
A
4πr2
4
Q
volume of a sphere
A
4/3 π r3
5
Q
volume of a cuboid
A
l x w x h
6
Q
surface area of a cuboid
A
To find the surface area of a cuboid which has 6 rectangular faces, add the areas of all 6 faces.
7
Q
area of a triangle
A
1/2 x b x h
