<h2>
AREA:</h2>
SQUARE IN THE MIDDLE
This is the easiest part: a square with side length s has area s^2, so the area of the square in the middle is

TRIANGLE ON THE LEFT
The base of this triangle is one side of the square, so it is 12 inches long. The height is given, and it is 8 inches long. The area of a triangle is half the product of width and height, and so we have

SEMICIRCLE ON THE RIGHT
The diameter of the semicircle is one side of the square, so it is 12 inches long. The radius is half the diameter, so it's 6 inches long. The area of a circle is
, so the area of a semicircle will be half this quantity:

The total area is the sum of these areas:

<h2>PERIMETER:</h2>
As for the perimeter, we have:
- The two sides of the triangle, which are 10 inches each.
- The top and bottom sides of the square
- Half the circumference of the circle
Since the circumference of a circle is
, the semicircumference will be 
So, the perimeter is
