So the area of eachsmalltriangleis:
The area of the entirehexagonis therefore:
You can also use the formulafor the area of a regularpolygonto find the area of eachbase:
Now just substitutevaluesto find the surfacearea of the entirefigureabove.
You can use the formula to find the surfacearea of any right prism.
Example 10
Use the formulato find the total surfacearea of the trapezoidalprism.