Use the order of operations: PEMDAS (parenthesis, exponents, multiplication, division, addition, & subtraction.)
Hope this helps!
Yes it is the same except there are two arcs you need to find the length for in this one.
We must remember the equation to find the area of a trapezoid first.
Area =

A and B are the bases (6 and 12)
The height is 6 for each trapezoid
Now Solve!
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SOLVING...
Area =

Area =

Area = 9 * 6
Area = 54
Since there are two trapezoids, multiply 54 by 2
54 x 2 = 108
Area = 108
You are cutting wood into equally sized pieces so if you know the length of the wood and the size of the cuts...
That would be...
2/3 ÷ 2/15 = 2/3 x 15/2 = 5 pieces