Geometric Model by A. Harry Wheeler, Equilateral Triangle Inside Out, Plane Dissection

Hinged Plane Dissection, Two triangles and two quadrilaterals which can be arranged as two different triangles (front side).

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Hinged Plane Dissection, Two triangles and two quadrilaterals which can be arranged as two different triangles (front side).
Hinged Plane Dissection, Two triangles and two quadrilaterals which can be arranged as two different triangles (front side).
Hinged Plane Dissection, Two triangles and two quadrilaterals which can be arranged as two different triangles (back side).
Hinged Plane Dissection, Two triangles and two quadrilaterals which can be arranged as two different triangles (back side).

Object Details

maker

Wheeler, Albert Harry

Description

This model has a wooden center, with plastic glued to both sides. The four pieces may be arranged to form an equilateral triangle two different ways. The model is hinged.

This appears to be model 4TH (Equilateral Triangle Inside Out) in Wheeler's list of decompositions of triangles.

A drawing for this model, dated April 16, 1932, is in 1979.3002.55, folder 2.

Compare MA.304723.811.

Location

Currently not on view

Credit Line

Gift of Helen M. Wheeler

date made

ca 1932

ID Number

MA.304723.812

accession number

304723

catalog number

304723.812

Object Name

geometric model

Other Terms

Dissection

Physical Description

plastic (overall material)

wood (overall material)

metal (overall material)

green (overall color)

red (overall color)

blue (overall color)

hinged (overall production method/technique)

Measurements

average spatial: 1.5 cm x 10.3 cm x 8.8 cm; 19/32 in x 4 1/16 in x 3 15/32 in

place made

United States: Massachusetts, Worcester

See more items in

Medicine and Science: Mathematics

Science & Mathematics

Plane Dissections

Data Source

National Museum of American History

Subject

Mathematics

Metadata Usage

CC0

Link to Original Record

https://n2t.net/ark:/65665/ng49ca746a9-3f64-704b-e053-15f76fa0b4fa

Record ID

nmah_1075796