JP3112675U - A visual visual teaching material for mathematics in which a transparent plastic cylindrical container is combined with a cone filled with beads. - Google Patents

A visual visual teaching material for mathematics in which a transparent plastic cylindrical container is combined with a cone filled with beads. Download PDF

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Publication number
JP3112675U
JP3112675U JP2005003777U JP2005003777U JP3112675U JP 3112675 U JP3112675 U JP 3112675U JP 2005003777 U JP2005003777 U JP 2005003777U JP 2005003777 U JP2005003777 U JP 2005003777U JP 3112675 U JP3112675 U JP 3112675U
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visual
cone
teaching material
cylindrical container
mathematics
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JP2005003777U
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恵子 岩田
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恵子 岩田
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Abstract

【課題】円錐はそれと同じ底面と高さをもつ円柱の体積の１／３であるが、それを手軽な方法で確かめることが出来る数学の視覚的教材を提供する。
【解決手段】手頃な大きさのプラスチック製円柱の容器の２／３の高さまで水をいれ，同じ底面・高さをもつ円錐を円柱の蓋にはりつけたものを静かに入れる。蓋をしたとき．隙間もなく，水もこぼれないことで，円錐の体積は円柱の体積の１／３であることが分かる。また，円錐の中にビーズを封入しているので目で理解しやすく，鑑賞用にもなる。
【選択図】図３Provided is a mathematical visual teaching material in which a cone is 1/3 of a volume of a cylinder having the same bottom surface and height, but can be confirmed in an easy way.
The water is poured to a height of 2/3 of an affordable plastic cylindrical container, and a cone having the same bottom and height is attached to the lid of the cylinder. When the lid is closed. Since there is no gap and no water spills, the volume of the cone is 1/3 of the volume of the cylinder. In addition, since the beads are enclosed in a cone, it is easy to understand with the eyes and is also for viewing.
[Selection] Figure 3

Description

本考案はまず，蓋付きプラスチックの円柱をつくる。次に底面が蓋の底面と同じで高さが円柱の高さと同じ円錐をつくるために，その側面図を作ってくみたて，底面のない円錐をつくり，そこに微細ビーズを詰め込み円柱の蓋にはりつける。The present invention first creates a plastic cylinder with a lid. Next, in order to create a cone whose bottom is the same as the bottom of the lid and whose height is the same as the height of the cylinder, we created a side view of it, created a cone without a bottom, packed fine beads into it and put it into the lid of the cylinder Crucifix.

円柱の容器の２／３の目盛りのところまで水を入れ，［０００１］の蓋付き円錐を静かに円柱の容器に入れる。 蓋をかぶせたとき，隙間もできず，水もこぼれなければ，円錐は円柱の体積の１／３である。Add water to the 2/3 scale of the cylindrical container, and gently place the [0001] covered cone into the cylindrical container. When the lid is put on, if there is no gap and no water spills, the cone is 1/3 of the volume of the cylinder.

背景分野Background field

円錐は同じ底面と高さをもつ円柱の体積の１／３であることは小学校で学ぶ。 実験としては円錐をさかさにした底のない容器に水を入れ，円柱の容器に３杯入ることで説明しているがあまり身近に感じない。We learn in elementary school that the cone is 1/3 of the volume of a cylinder with the same base and height. As an experiment, it is explained that water is put in a container without a bottom with a conical top, and three cups are put in a cylindrical container.

考案が解決しようとする課題Problems that the device tries to solve

そこで本考案では手頃な大きさのプラスチック製円柱の容器の２／３の高さまで水をいれ，同じ底面・高さをもつ円錐を円柱の蓋にはりつけたものを静かに入れる。蓋をしたとき．隙間もなく，水もこぼれないことで，円錐の体積は円柱の体積の１／３であることが分かる。また，円錐の中にビーズを封入しているので目で理解しやすく，鑑賞用にもなる。Therefore, in the present invention, water is poured up to 2/3 height of an affordable plastic cylindrical container, and a cone with the same bottom and height attached to the lid of the cylinder is gently put. When the lid is closed. Since there is no gap and no water spills, the volume of the cone is 1/3 of the volume of the cylinder. In addition, since the beads are enclosed in a cone, it is easy to understand with the eyes and is also for viewing.

円柱の容器の２／３まで水を入れた図である。It is the figure which put water up to 2/3 of the cylindrical container. 円柱と同じ底面・高さをもつ円錐を円柱の蓋にはりつけたものA cone with the same bottom and height as the cylinder, attached to the cylinder lid ［図２］の蓋付き円錐を［図１］の円柱の水入り容器に静かに入れ蓋をしたところWhen the lid with the lid of [Fig. 2] is gently put in the cylindrical water container of [Fig.

符号の説明Explanation of symbols

１ 円柱のプラスチック容器
２ 円柱のプラスチック容器の蓋
３ 円錐のプラスチック容器（円柱と同じ底面・高さをもつ）
４ 封入されている微細ビ−ズ
５ 円柱の容器の２／３まで入れた水1 Cylindrical plastic container 2 Cylindrical plastic container lid 3 Conical plastic container (with the same bottom and height as the cylinder)
4 Enclosed fine beads 5 Water filled up to 2/3 of cylindrical container

Claims (4)

透明なプラスチックで作った蓋付き円柱と，その円柱と底面・高さが等しいプラスチック製円錐から成る数学の視覚的教材  A visual mathematics teaching material consisting of a cylinder with a lid made of transparent plastic and a plastic cone with the same base, height and bottom. ［請求項１］のプラスチック製円錐の中にさらにビ−ズを封入して円柱の蓋に固定した特徴をもつ，数学の視覚的教材  A visual visual teaching material for mathematics characterized in that a bead is further enclosed in the plastic cone of [Claim 1] and fixed to a cylindrical lid. ［請求項１］のプラスチック円柱容器の高さの１／３，２／３のところに目盛りを有する視覚的教材  A visual teaching material having a scale at 1/3 and 2/3 of the height of the plastic cylindrical container of [Claim 1]. 円錐に詰めるビーズをクリスマスカラ−とし，鑑賞用にも使えるようにした視覚的教材  Visual teaching materials that use beads for packing in a cone as a Christmas color for viewing.
JP2005003777U 2005-04-27 2005-04-27 A visual visual teaching material for mathematics in which a transparent plastic cylindrical container is combined with a cone filled with beads. Expired - Fee Related JP3112675U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2005003777U JP3112675U (en) 2005-04-27 2005-04-27 A visual visual teaching material for mathematics in which a transparent plastic cylindrical container is combined with a cone filled with beads.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2005003777U JP3112675U (en) 2005-04-27 2005-04-27 A visual visual teaching material for mathematics in which a transparent plastic cylindrical container is combined with a cone filled with beads.

Publications (1)

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JP3112675U true JP3112675U (en) 2005-08-25

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JP2005003777U Expired - Fee Related JP3112675U (en) 2005-04-27 2005-04-27 A visual visual teaching material for mathematics in which a transparent plastic cylindrical container is combined with a cone filled with beads.

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