公开(公告)号：US5732474A

公开(公告)日：1998-03-31

申请号：US666958

申请日：1996-06-20

申请人： Peggy Cannon

发明人： Peggy Cannon

IPC分类号： B43L7/12 ,  G01B3/56 ,  B43L7/10 ,  G01B5/24

CPC分类号： G01B3/563 ,  B43L7/12

摘要： The present invention herein called "LABEs", comprises a manipulative for assisting students in the visual understanding of the relationships of all angles in a rectangle, triangle, or other such geometric shapes relative to their side lengths, thus allowing the student to prove theorems used in the teaching of geometry. The manipulative further comprises a disk having indicia representing a 360 degree compass, the disk having a first fixed leg, bearing indicia in units of length, extending from the disk at a point adjacent the zero degree indicia mark, and a second leg, having a sleeve portion, which is pivotally attached to the center of the disk by a snap grommet, the sleeve portion being capable of accepting the fixed leg of a second LABE in a longitudinal, adjustable manner therein.

摘要翻译： 本发明在此称为“LABE”，其包括一个操作，以协助学生在相对于它们的侧面长度的矩形，三角形或其他这样的几何形状中的所有角度的关系的视觉理解中，从而允许学生证明使用的定理 在几何学的教学中。 所述操纵器还包括具有代表360度罗盘的标记的盘，所述盘具有第一固定腿，以与所述零度标记标记相邻的点处从盘延伸的以长度为单位的承载标记，以及第二腿，具有 套筒部分，其通过卡扣环环枢转地附接到盘的中心，套筒部分能够以其纵向可调节的方式接纳第二LABE的固定腿。