HERE is a repetitive procedure that pupils will find intriguing. It requires only care and accuracy in subtraction, for which it provides some well-disguised drill. However, for the alert student, it ...offers the opportunity to dig out many underlying principles.
To most laymen, the word
pyramid
invokes an image of the Egyptian variety, with isosceles triangular lateral fares and a
square
base. Similarly, to many students a tetrahedron is the regular kind ...with four equilateral triangular faces. This restricted concept is fostered by the prevalent use of models of this type. Understanding can be increased by offering the student an opportunity to see, handle, and make models of other types of tetrahedrons.
THE faces of a right regular
prism
consist. of two regular
n
-gona (the bases) connected by
n
rectangles (the lateral faces). Thus there are two rectangles and one
n
-gon at each vertex. When the ...rectangles are squares and
n
= 4, the prism is a cube.
A DIGITAL BRACELET FOR 1971 TRIGG, CHARLES W.
The Mathematics teacher,
10/1971, Letnik:
64, Številka:
6
Journal Article
Recenzirano
A Bracelet is one period of a simply periodic series considered as a closed sequence with terms equally spaced around a circle. Thus distances between terms may be measured in degrees or in steps. A ...bracelet may be regenerated by starting at any arbitrary point to apply the generating law. A bracelet may be cut at any arbitrary point for straight-line representation without loss of any properties.
A CARD TRICK TRIGG, CHARLES W.
The Mathematics teacher,
05/1970, Letnik:
63, Številka:
5
Journal Article
Recenzirano
A Perennially popular card trick, now resurgent, has a simple algebraic explanation. Understandable and stimulating to second-semester algebra students, it is comprehended with difficulty by those ...laymen so long removed from school days that they intellectually reject the (-)(-) = + concept and for whom
x
is externally unknown. They can learn to do the trick mechanically, but still wonder why it works.
PDF
