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Test device for circular triangle probability

A test device and triangle technology, which is applied in educational appliances, instruments, teaching models, etc., can solve the problems of different results of the probability problem of circular triangles, and achieve the effect of high promotion and application value and high accuracy.

Inactive Publication Date: 2012-04-11
ZHEJIANG OCEAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The problem to be solved by the present invention is the deficiency that the existing integral method and graphic method solve the circular triangle probability problem and the results are quite different

Method used

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  • Test device for circular triangle probability

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Embodiment Construction

[0016] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0017] As shown in the figure, the circular triangular probability test device includes a straight conduit 1, a test bead 2, a hollow tube 3, a cone top cylinder inner cylinder 4, a cone top cylinder outer cylinder 5 and a bottom plate 6, and the top of the cone top cylinder outer cylinder 5 is installed with Straight conduit 1, cone-top cylindrical inner cylinder 4 is set inside the cone-top cylindrical outer cylinder 5, the two are concentric and fixed through the bottom plate 6; hollow tube 3 is installed on both the cone-top cylindrical inner cylinder 4 and the cone-top cylindrical outer cylinder 5 In the formed gap, there are three test beads 2 in total.

[0018] The test bead 2 is a circular rubber bead; the material of the whole device is glass or transparent plastic, so as to facilitate the test observation; the bottom plate 6 is circular, on wh...

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Abstract

The invention relates to a test device for a circular triangle probability, belonging to the field of mathematical verification equipment. The device comprises a straight guide pipe, test balls, hollow pipes, a cylindrical inner cylinder with a conical top, a cylindrical outer cylinder with a conical top and a bottom plate, wherein the straight guide pipe is mounted at the top of the cylindrical outer cylinder with the conical top; the cylindrical inner cylinder with the conical top is sleeved on the inner side of the cylindrical outer cylinder with the conical top; the cylindrical inner cylinder with the conical top and the cylindrical outer cylinder with the conical top are concentric and are fixed through the bottom plate; the hollow pipes are mounted in a gap which is formed by the cylindrical inner cylinder with the conical top and the cylindrical outer cylinder with the conical top; and the three test balls are arranged. The test balls are round rubber balls and the whole deviceis made of glass or other transparent materials so that the test is convenient to observe; the bottom plate is round and is provided with a protractor with a measurement range of 360 degrees; the hollow pipes are fully distributed in the gap which is formed by the cylindrical inner cylinder with the conical top and the cylindrical outer cylinder with the conical top; and the conical top on the cylindrical inner cylinder with the conical top rightly faces to the circle center of the straight guide pipe. The device can be used for explaining and analyzing an abstract problem of circular triangle probability by means of a mould test and has the advantage of high accuracy.

Description

technical field [0001] The invention relates to a test device, in particular to a test device for verifying the probability of a circular triangle, and belongs to the field of mathematical verification equipment. Background technique [0002] This device is based on a mathematical probability problem: three points are randomly selected on a circle, and the three points are connected in sequence. What are the probabilities that the triangle formed by the connection is a right-angled triangle, an acute-angled triangle, and an obtuse-angled triangle? [0003] This problem is not a problem that can be easily solved from the perspective of probability. There have been many relevant people who have analyzed this problem, but the answers to the problem are various. Therefore, based on this situation, we can make a The model of the circular triangular probability cylinder is used for experiments, and the result value obtained from multiple experiments is the test frequency to appro...

Claims

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Application Information

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IPC IPC(8): G09B23/04
Inventor 施鸣鸣白兴兰
Owner ZHEJIANG OCEAN UNIV
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