Curve stitching activities can be used to motivate calculus students. The problem described here involves showing that a given envelope of a curve is parabolic. (SD)

The use of paper folding to study properties of geometric solids is discussed. (SD)

Reluctant learners made plastic geometric shapes for use in classroom activities. (SD)

The curriculum guide correlates concepts in geometry with career-oriented concepts and activities. The curriculum outline format gives the concepts to be taught, matched with related career-oriented performance objectives, concepts, and suggested instructional activities in facing page layouts. The suggested curriculum outline is compatible with…

Equations or systems of equations can be associated with letters of the alphabet printed in the coordinate plane. Messages can be coded and decoded with a computer or by hand. (SD)

Planned experiences for exploration of materials are suggested for introducing geometric concepts. Examples discussed include motion, symmetry, and shape. (MP)

Activities are presented that permit students to gain firsthand experiences with ideas about two-dimensional and three-dimensional shapes and volume that textbook exercises rarely provide. (MP)

These worksheets, involving polygonal shape made with four hexagons, are given. Students are to develop problem-solving skills involving congruence and symmetry. (MP)

Worksheets are presented by grade level that give practice in comparing and measuring areas. (MP)

Relationships between the linear dimensions, surface area, and volume of parallelepipeds are examined. (SD)

This article examines the Pythagorean Theorem from a geometric point of view by suggesting some natural extensions of the theorem. The use of a more general theorem to prove a difficult one is suggested, where possible. The article includes figures and proofs. (Author/MA)

Preservice elementary teachers were given the task of showing a special case of the Pythagorean theorem by paper cutting. In the process they developed approximations to the square root of two. (SD)

Activities involving the drawing of pictures using coordinate geometry are described. One year a contest was held; another year, murals were drawn on walls. (MNS)

Presents three activities in which students learn about and construct star polygons using the LOGO programing lanaguage. A list of suggested extension activities is included. (JN)

Four worksheets on geometry are given. Experiences in identifying and constructing described shapes, drawing congruent polygons, and visualizing the shapes needed to build hexagons are included. (MNS)