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.
Illustration of three circles enclosed in an equilateral triangle.
An illustration of a Roman Numeral clock showing 2:30.
Illustration of 30 congruent cubes stacked in decreasing heights. A 3-dimensional representation on…
An illustration of a pyramid with the top cut off by a plane parallel to the base. The remaining part…
30-60-90 Right Triangle
30-60-90 right triangle.
An isosceles triangle with angles 120, 30, 30
An isosceles triangle with angles 30, 75, 75
Trigonometric reference triangles/angles drawn for 60 degree reference angel in quadrants I and II.
Special right triangle with angles 30 degrees, 60 degrees, and 90 degrees with side measures/relationships…
Steam pipe illustration of 30-60-90 triangle.