I find it easier to put them in decimal form then to try and find a common denominator
2/3 = 0.666
2/9 = 0.222
5/6 = 0.833
11/18 = 0.611
least to greatest = 2/9, 11/18, 2/3, 5/6
Answer: about 450.52
Use Pythagorean Theorem to find the diameter of the circle. Divide the diameter by 2 to find the radius, and solve for the area of the circle (πr^2). Then, solve for the area of the triangle (bh/2). Subtract the area of the triangle from the area of the circle.
This is true.
These are perfect squares: 4, 9, 25. These are not: 7, 8, 11