Illustration of circle with inscribed angle 30 and central angle 60.

Illustration of three circles enclosed in an equilateral triangle.

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…

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…