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50.6 MB (1.9 MB compressed)
4657 x 3795 pixels
39.4 x 32.3 cm ⏐ 15.5 x 12.7 in (300dpi)
LAWRENCE LAWRY / SCIENCE PHOTO LIBRARY LAWRENCE LAWRY / SCIENCE PHOTO LIBRARY
Geometry set. Plastic instruments used for geometry and technical drawing. Protractors (upper left and lower right) are used to measure angles. Set squares (top right and lower left) are used to draw fixed angles. Graduated markings, such as on the ruler (centre left), are used to measure distance.
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