A planetary system based on the musical proportion, 6, 8, 9, 12, of the arithmetic mean and the harmonic mean between the geometic ratios of 6 and 12, along with the other tones of the Pythagorean diatonic (major) scale (Lawlor, Robert. 1982. Sacred Geometry. Thames & Hudson, London)
Maze - Find the Arithmetic Mean (middle term) of an Arithmetic Sequence from nevergiveuponmath on TeachersNotebook.com - (4 pages) - This activity is a review of understanding how to find the "Arithmetic Mean". This maze requires students to "Find the Arithmetic Mean of an arithmetic sequence given the term before and after.