Areas of Polyhedra  
Polyhedra  
The surface area of a pyramid whose base is a regular polygon. 

This is
a centred pyramid that has a regular polygon as a base. To find the total surface area of a pyramid we add up the surface area of its base and the lateral surface area. 

You can rotate
the figure by moving the red dot. What you are going to measure has
to be straight. Do measurements
in centimetres, if the value is not a whole number, use a decimal
number. To separate the whole part from the decimal part, you have to
use a dot instead of a comma. Write down
each measurement in the box below and hit Enter. If it is correct, it
will appear in the window. Take the corresponding units to each yellow circle. 
Eduardo Barbero Corral  
Spanish Ministry of Education , Social Afairs and Sport. Year 2007  
Except where otherwise noted, this work is licensed under a Creative Common License