Triangle is equilateral with sides of 6. Therefore all angles = 60° Ht of 30-60-90 is 3sr3 = 5.196 Area of 30-60-90 = 1/2×b×h = 3×5.196 Area = 15.59 Pie slice from each corner = 60/360×pi×r^2, with r = 3 1/6×pi×9 = 4.71 × 3 pie slices = 14.13 So, shaded inner region = area triangle - 3 pie corners = 15.59-14.13 = 1.46
