Mensuration Formulae
|
 |
= |
3.1416 |
 |
= |
9.8696 |
 |
= |
0.3183 |
 |
= |
1.7725 |
|
| |
| Circle |
 |
| area |
= |
x radius squared |
|
| circumference |
= |
x diameter |
|
| area of the segment |
= |
area of sector - area of triangle |
|
| area of the sector |
= |
length of arc x ½ radius |
|
| length of arc |
= |
degrees in arc x radius x 0.01745 |
|
|
| |
| Triangle |
|
| area |
= |
½ base x perpendicular height |
|
|
| |
| Suare, Rhombus, Rhomboid |
|
| area |
= |
base x height |
|
|
| |
| Ellipse |
|
| area |
= |
long axis x short axis x 0.7854 |
|
|
| |
| Trapezium |
|
| area |
= |
height x (½ the sum of two parallel sides) |
|
|
| |
| Cone |
|
| surface |
= |
½ (slant height x perimeter of base) + area of base |
|
 |
| volume |
= |
(area of base x perpendicular height) ÷ 3 |
|
|
|
| |
| Cylinder |
|
| surface |
= |
(length x perimeter) + (area of
two ends) |
|
| volume |
= |
area of base x height |
|
|
| |
| Sphere |
|
| surface |
= |
square of the diameter x π |
|
| volume |
= |
cube of diameter x 0.5236 |
|
|
| |
| Pyramid |
|
| surface |
= |
½ (slant height x base perimeter)+ area of base |
|
| volume |
= |
(area of base x perpendicular height) ÷ 3 |
|
|
| |
| Prism |
|
| surface |
= |
(length x perimeter) + (area of
two ends) |
|
| volume |
= |
area of base x height |
|
|
