Spanton, J. Humphrey (John Humphrey) · London, Macmillan and Co., Limited; New York, The Macmillan Company · leaf 23
les is called a rectangle(Fig. 16) or oblong. A rectangle which has its sides equalcalled a square (Fig. 17). A parallelogram whose anglesare not right angles is calleda rhombus, if its sides are allequal (Fig. 18), or a rhomboid ifthe opposite sides alone areequal—Gk. rhombos^ from rhein-bein^ to… … Polygons. A polygon is a plane figure which has more than four angles.A polygon which is both equilateral and equiangular is calledregular. 10 GEOMETRICAL DRAWING AND DESIGN. A polygon of five sides is called a pentagon.„ „ six „ „ hexagon. „ „ seven „ „ heptagon. „ „ eight „ „ an octagon, etc.…
Geometrical drawing · Design · Drawing
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