The questions want to know the area of the circle around the triangles. So you need to find the combined area of all the triangles and subtract that from the area of the circle. You can find the area of the triangles with A= 1/2 bh. The height is 1 and the base is 1, 1 x 1 is 1, so you just half to multiply 1 by 1/2, which is 1/2. There are 5 triangles so 1/2 x 5 is 5/2 or 2 1/2. The area of the circle is pi(r squared). The radius is half of the diameter and the given diameter is 6, so the radius is 3. 3 squared is 9 and 9 times pi is about 28.3. You have to find the area without the triangles so we should subtract 2.5 from 28.3. That means the answer is 25.8
