CN87214466U - Multipurpose teaching ruler - Google Patents

Multipurpose teaching ruler Download PDF

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Publication number
CN87214466U
CN87214466U CN 87214466 CN87214466U CN87214466U CN 87214466 U CN87214466 U CN 87214466U CN 87214466 CN87214466 CN 87214466 CN 87214466 U CN87214466 U CN 87214466U CN 87214466 U CN87214466 U CN 87214466U
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CN
China
Prior art keywords
ruler
angle
utility
multipurpose teaching
teaching ruler
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
CN 87214466
Other languages
Chinese (zh)
Inventor
彭梦华
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to CN 87214466 priority Critical patent/CN87214466U/en
Publication of CN87214466U publication Critical patent/CN87214466U/en
Withdrawn legal-status Critical Current

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  • Drawing Aids And Blackboards (AREA)
  • Length-Measuring Instruments Using Mechanical Means (AREA)

Abstract

The utility model discloses a multipurpose teaching rule which can directly draw a general special angle and can be used as a protractor, and the utility model is composed of the combination of two set squares with the special angles and a graphometer.

Description

Multipurpose teaching ruler
In mathematics, physics teaching, often use set square and graphometer protractor, one group totally three ruler.The utility model is combined three rulers, constitutes the multipurpose educational chi.Make this teaching chi and can save lot of materials.This chi carries more convenient, can satisfy the needs of general teaching.
This chi is on the basis of the right angle triangle that 30 °, 60 °, 90 ° three angles are arranged originally, and the interior angle of 60 ° of rulers is changed interior angle at 45.Ruler after the improvement with constituting the vertical bar shaped plate on the shortest limit of triangle, makes trapezoidal plate into.
When using this ruler, only need interior angle or the special angle that just can directly draw 30 °, 45 °, 60 °, 75 °, 90 ° and 105 °, exterior angle with it.
On the minor face of ruler, add the scale of upper angle in addition, constitute protractor.The center of protractor is on the hypotenuse of set square, and is whole the structure of ruler such as accompanying drawing.

Claims (3)

1, a kind of multipurpose educational chi is the right angle triangle that 30 °, 60 °, 90 ° three angles are arranged, and it is characterized in that: the interior angle that ruler is 60 ° changes 45 ° interior angle into, adds the scale of upper angle on the minor face of ruler.
2, utility model according to claim 1 is characterized in that an interior angle of ruler is 45 °.
3, utility model according to claim 1 is characterized in that the center of protractor is on the hypotenuse of ruler.
CN 87214466 1987-10-22 1987-10-22 Multipurpose teaching ruler Withdrawn CN87214466U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 87214466 CN87214466U (en) 1987-10-22 1987-10-22 Multipurpose teaching ruler

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 87214466 CN87214466U (en) 1987-10-22 1987-10-22 Multipurpose teaching ruler

Publications (1)

Publication Number Publication Date
CN87214466U true CN87214466U (en) 1988-06-01

Family

ID=4828782

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 87214466 Withdrawn CN87214466U (en) 1987-10-22 1987-10-22 Multipurpose teaching ruler

Country Status (1)

Country Link
CN (1) CN87214466U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106114012A (en) * 2016-07-29 2016-11-16 咸宁职业技术学院 The set square for teaching of circle drawn by a kind of band slideway
CN109410710A (en) * 2018-11-02 2019-03-01 珠海格力电器股份有限公司 A kind of measurement method and device of period of single pendulum

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106114012A (en) * 2016-07-29 2016-11-16 咸宁职业技术学院 The set square for teaching of circle drawn by a kind of band slideway
CN109410710A (en) * 2018-11-02 2019-03-01 珠海格力电器股份有限公司 A kind of measurement method and device of period of single pendulum

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Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C14 Grant of patent or utility model
GR01 Patent grant
C19 Lapse of patent right due to non-payment of the annual fee
CF01 Termination of patent right due to non-payment of annual fee