A game for the HP-25 programable calculator is discussed. The objectives of the game are to introduce angle measurement and the rudiments of trigonometry. A program for the game is given. (MP)

It is shown that a unit segment can be constructed from a given line segment of length the square root of x if x is a surd. (MP)

Detailed instructions are given for the construction of a line segment of length cube root of two. A proof is also given. (MP)

A geoboard-related extremal problem dealing with both concave and convex polygons is discussed and a proof is given of the solution. (MP)

Questions which stimulate discovery learning are asked concerning polygons and curves drawn on an integral lattice. (DT)

A simple geometric construction giving acceptable approximations to the locations of twelve points for placing frets on a guitar is described both geometrically and analytically. (DT)

The place of Euclidean deductive geometry in the secondary school curriculum is considered and implications for mathematical education are highlighted. (MN)

The formula for the sum of the nth powers of the first k integers was shown by Bernonlli to be obtainable from Pascal's triangle. The derivation is reported. (SD)

Advantages of representing ternary and quaternary composition diagrams by means of rectangular coordinates were pointed out in a previous paper (EJ 288 693). A further advantage of that approach is that analytic geometry, based on rectangular coordinates, is directly applicable as demonstrated by the examples presented. (JN)

Included in this section are brief articles on drawing altitudes of triangles, sketching parabolas, and visualizing variability. (MNS)

Presents an activity in which students estimate the weight and volume of one million dollars in notes and coins of various denominations. Also presents several geometry activities. Student worksheets for the activities are included. (JN)

A proof is given concerning the intersection of the medians of a triangle, then the problem is generalized and discussed. (DT)

Different methods for doing five basic geometric constructions are described. (DT)

A geometric method of solving quadratic equations is described. (DT)

An algebraic-geometric solution technique used by the ancient Chinese is examined. (DT)