How do you work out this attached file?

Step-by-step explanation:

Remark

If you take 1 vertex of your 12-gon and draw lines (excluding the lines from the vertex you have chosen) to the 10 other vertices you get 10 triangles. Each triangle has 180 degrees.

The total number of degrees in the interior of the 12-gon is 180 * 10 = 1800

Each interior angle is 1800/12 = 150

There is a formula that you can make

180 * (# sides - 2) / # sides  

there is no picture

step-by-step explanation:

put up a picture so people can you

step-by-step explanation:

there is a formula i can give you:

it is r^2*n*sin(360/n) divided by 2 where r represents the "radius" and n is the number of sides.

plug them in:

(10sqrt(3))^2*6*sin(360/6) divided by 2

100*3*6*sin(60) divided by 2

900*sin(60)

900*sqrt(3)/2

450*sqrt(3)

approx is 779.4 cm^2