Illustration of circle with inscribed angle 30 and central angle 60.
Groups of change with totals from 1 to 100 cents using the least amount of coins.
Regular hexagon with equilateral triangles divided in the interior.
30-60-90 Right Triangle
30-60-90 right triangle.
An isosceles triangle with angles 60, 60, 60
Steam pipe illustration of 30-60-90 triangle.