Educational film guide ()

1949 EDITION 512-513 INTRODUCTION TO VECTORS— COPLANAR CONCURRENT FORCES. Castle 22min sd $34.31 512 c-tr Guide Produced by the U.S. Office of Education. Accompanying fllmstrip $1 Explains the meaning of scalar and vector quantities and how to add them; explains the various methods of vector composition and vector resolution; and shows how vectors may be employed to solve engineering problems VECTOGRAPHS. Castle 1948 21min sd $27.12 512 sh-c-tr-ad Produced by the U.S. Navy Defines the vectograph, shows the equipment used and demonstrates the procedure for making the vectograph transparency 5 1 3 Geometry ANGLES. KnowledgeBldrs 1945 12min sd (Practical geometry ser) $40, rent $2 513 sh-c-tr Guide Depicts various types of angles and their relationship to each other ANGLES AND ARCS IN CIRCLES. Knowledge Bldrs lOmin sd (Practical geometry ser) $40, rent $2 513 sh-c-tr Guide Measurement of central angles, arcs. Inscribed angles and angles formed by two chords. Theorems and proofs are effectively introduced and demonstrated by means of animated drawings AREAS. KnowledgeBldrs 12min sd (Practical geometry ser) $40, rent $2 513 sh-c-tr Guide Presents the needs and uses for finding areas of various figures, shows clear graphic demonstrations of recognized methods for the computing areas of rectangles, parallelograms, triangles and circles CHORDS AND TANGENTS OF CIRCLES. KnowledgeBldrs lOmin sd (Practical geometry ser) $40, rent $2 513 sh-c-tr Guide Advanced phase of "The Circle" (listed below) demonstrates the theorem on a perpendicular to a chord within the circle, and all types of tangents THE CIRCLE. KnowledgeBldrs lOmln sd (Practical geometry ser) $40, rent $2 513 sh-c-tr Guide The circle presents many problems to the geometry student: radii, diameters, chords, tangents, secants, arcs and central angles are presented and clarified In this film, and theorems and proofs are introduced CONGRUENT FIGURES. KnowledgeBldrs 1945 12min sd (Practical geometry ser) $40, rent $2 513 sh-c-tr Guide Illustrates the geometric principles of "equal sides and equal angles," and clarifies methods for finding and proving that angles and sides are equal GEOMETRY AND YOU. Coronet 1948 lOmln sd $45; also color $90 513 Jh-sh-c Guide Collaborator: Harold P. Fawcett, professor of mathematics, Ohio state University In constructing a model porch Jim and Bob use protractor and ruler to apply their study of such figures as rectangles, triangles and circles, and such principles as congruence, similarity and symmetry GEOIVIETRY IN ACTION. LlbraryFlm 1940 llmin sd (Geometry brought to life) $30 513 sh-tr Produced by Bald Eagle Film Productions In collaboration with David Reichgott and Lee Spiller, authors of "Today's Geometry" Indicates the application of the laws of geometry to everyday living; in nature, the home, at work and at play LINES AND ANGLES. KnowledgeBldrs 1945 12min sd (Practical geometry ser) $40, rent $2 513 sh-c-tr Guide "Geometry has been used down through the ages. Some of these uses are shown. Emphasis is placed on angles — straight, right, acute, obtuse, reflex. The tempo of the narration is deliberate enough for good understanding. Particularly recommended for junior high school mathematics classes." Collaborator LOCUS. KnowledgeBldrs 1945 12min sd (Practical geometry ser) $40, rent $2 513 sh-c-tr Guide Visualizes and explains by a combination of photography, drawings and the spoken word POLYGONS. KnowledgeBldrs 1948 12min sd (Practical geometry ser) $40, rent $2 513 sh-c-tr Guide Opens by showing real life polygons. The definition of polygon and the ideas of convex and concave are clarified by animation. The inscribed circle and the circumscribed circle of a regular polygon are described. The sum of the interior angles theorem and the sum of the exterior angles theorem are covered in detail PRACTICAL GEOIVIETRY. KnowledgeBldrs lOmin sd $40, rent $2 513 sh-c-tr Helps to visualize the mathematical applications of basic geometry. Beginning with the erection of a perpendicular, the film Illustrates the relationship of the perpendicular with the ordinary plumb bob, level and square PROPERTIES OF TRIANGLES. Knowledge Bldrs 1947 12min sd (Practical geometry ser) $40, rent $2 513 sh-c-tr Guide The practical importance of the rigidity of the triangle is illustrated by comparing the strength of triangles with the strength of non-rigid figures. Animated treatments of the angle bisectors theorem, the perpendicular bisectors theorem, tlie altitudes tiieorem and the medians theorem follow. The merging of lines and points wlien a triangle becomes equilateral is shown PYTHAGOREAN THEOREM. KnowledgeBldrs 1947 12min sd (Practical geometry ser) $40, rent $2 513 sh-c-tr Guide Presents the historical background of the theorem and includes a detailed discussion of an interesting use of the 3-4-5 triangle by the Egyptians. The theorem is proved and examples are shown. The basic importance of the theorem is stressed QUADRILATERALS. KnowledgeBldrs 1946 12min sd (Practical geometry ser) $40, rent $2 513 sh-c-tr Guide Chief properties of the Important quadrilaterals: parallelogram, rectangle, rhombus, square, trapezoid and trapezium RATIO AND PROPORTION. KnowledgeBldrs 1948 llmin sd (Practical geometry ser) $40, rent $2 513 sh-c-tr Guide Shows some applications of the Idea of ratio in various real life situations. The rela 373