These web-based activities were developed, during summer sessions from 1997 through 1999, by students at Mainland High School, located in Daytona Beach, FL. As part of Mainland's CCTT grant, the students were given permission by the book's publisher to convert the ancillary materials of the County's adopted Algebra 1 textbook (Glencoe Algebra 1 — ISBN: 9780028253282) into html format.
Long-Term Project: Magic squares can also be arranged in a planetarium array. Copyright 1997-1999: html adaptation
Algebraic Magic Squares
15. Add the numbers on each of the four concentric
ellipses, and on each of the four aligned orbital paths. Describe the sums.
16. Complete this planetarium array so that the
magic-square constant is 62.
17. Subtract 10 from each number in the array from
exercise 16. Is the new array a planetarium array?
18. Complete this planetarium array so that the
magic-square constant is 4x + 6.
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Career Connection to Teaching with Technology