CN2332015Y

CN2332015Y - Trisection instrument for arbitrary angle in plane

Info

Publication number: CN2332015Y
Application number: CN 98221655
Authority: CN
Inventors: 姜建明
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-06-30
Filing date: 1998-06-30
Publication date: 1999-08-04
Anticipated expiration: 2008-06-30

Abstract

The utility model provides a trisection instrument for arbitrary angle in plane. The trisection instrument for an arbitrary angle in plane is provided with a straight ruler, and horizontal positioning lines with a point A, a point O and a point B are respectively arranged on the straight ruler; the point O is at the center point of the positioning line, and a left and a right sides of the point O are respectively provided with the point A and the point B which are equal to the point O; the left ends of a movable straight ruler and a T-square ruler respectively pass the point A and the point O and are connected with the straight ruler; the movable straight ruler is contacted with the T-square ruler. The utility model can be convenient for teaching, can make students deepen the understanding of the geometry principle very easily and is a technology which is worth generalizing.

Description

Any angle trisection instrument in the plane

The utility model relates to the teaching aid technical field, any angle trisection instrument in specifically a kind of plane.

At present, the teacher particularly with in the plane arbitrarily during the trisection of angle, mostly realizes that by make some line segments on blackboard it is pretty troublesome so not only to impart knowledge to students when the student is carried out several teaching, and is difficult to make the student to deepen understanding to geometrical principle.

The purpose of this utility model is for solving above-mentioned insufficient section, and providing a kind of can conveniently impart knowledge to students, and can be easy to make in the plane that the student deepens geometrical principle is understood angle trisection instrument arbitrarily.

The purpose of this utility model is achieved through the following technical solutions: any angle trisection instrument in the plane, it has ruler, the level that has an A, some O, some B is respectively arranged to position line on the ruler, point O is in the center of position line, the and arranged on left and right sides of point O has some A and the some B with its equidistance respectively, the left end of moving ruler, T-square is hinged with ruler mutually by an A and some O respectively, and moving ruler contacts with T-square.

Advantage of the present utility model: one, design science is reasonable, and it utilizes geometrical principle to be made as the teaching aid that figurate number is melted mutually in conjunction with, meaning reason, has both made things convenient for teaching, can be easy to make the student to deepen understanding to geometrical principle again; Two, simple in structure, easy making, with low cost, easy to use.Widespread use of the present utility model can produce good social, economic benefit.

Figure of description is a structural representation of the present utility model.

In conjunction with the embodiments the utility model is described in further detail below with reference to Figure of description.

Any angle trisection instrument in the plane of the present utility model, it has ruler 1, the level that has an A, some O, some B is respectively arranged to position line 2 on the ruler 1, point O is in the center of position line 2, the and arranged on left and right sides of point O has some A and the some B with its equidistance respectively, the left end of moving ruler 3, T-square 4 is hinged with ruler 1 mutually by some A and some O respectively, and moving ruler 3 contacts with T-square 4.Some D, the some C on the T-square 4 on the moving ruler 3 coincide with a B respectively, and some E on the T-square 4 and some A coincide, the center of the some F on the T-square 4 between an O and some C.

During making, process various chis with transparent material, and it is fitted together get final product by above-mentioned requirements.During use, if when trisection is made at a certain angle in the plane, the base of position line on the utility model ruler 12 with this angle coincided, and make a little 0 to coincide with the summit at this angle, stirring T-square 4 this moment makes its C promote moving ruler 3 displacements, when the another side for the treatment of the point of crossing of ruler 3 and T-square 4 and this angle coincides, when promptly putting the another side of D and coinciding to some A line and some E to the crossing crunode of some F line and this angle, point C is to the straight line of some O and the angle of this angle another side on the T-square 4, be 1/3rd jiaos of this angle, tell other two jiaos according to 1/3rd jiaos with divider then and get final product.

Claims

1, any angle trisection instrument in the plane, it has ruler (1), it is characterized in that: the level that has an A, some O, some B is respectively arranged on the ruler (1) to position line (2), point O is in the center of position line (2), the and arranged on left and right sides of point O has some A and the some B with its equidistance respectively, the left end of moving ruler (3), T-square (4) is hinged with ruler (1) mutually by some A and some O respectively, and moving ruler (3) contacts with T-square (4).

2, any angle trisection instrument in the plane according to claim 1, it is characterized in that: some D, the some C on the T-square (4) on the moving ruler (3) coincide with a B respectively, some E on the T-square (4) coincides with putting A, the center of the some F on the T-square (4) between an O and some C.