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Figure 5: Use of dashed lines to represent edges hidden in views of a complicated object.

Figure 7: Identification of the hidden edge in third-angle projections of a tetrahedron (see text).

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Close-up of ostriches (Struthio camelus) necks and heads; location unknown.

6 of the World's Most Dangerous Birds

jeans, denim, pants, clothing

Why Do We Say “A Pair of Pants”?

Odissi Indian classical female dancer on white background. (Indian dancer; classical dancer; Indian dance)

6 Classical Dances of India

The impeachment trial of Pres. Andrew Johnson, illustration from Frank Leslie's Illustrated Newspaper, March 28, 1868.

What If the President Is Impeached?

Abstract vector hi speed internet technology background

History of Technology Timeline

Red Army (Soviet) soldiers in the Russian Revolution.

Russian Revolution Timeline

Bog body. Head of Tollund Man. Died at about age 30-40, Dated to about 280 BCE early Iron Age. Found Bjaeldskovdal bog Denmark in 1950 near Elling Woman. Most well preserved bog body to date. Human remains mummified in natural peat bogs. mummy, embalm

9 Noteworthy Bog Bodies (And What They Tell Us)

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Images

Figure 5: Use of dashed lines to represent edges hidden in views of a complicated object.

Figure 5: Use of dashed lines to represent edges hidden in views of a complicated...

Encyclopædia Britannica, Inc.

Figure 7: Identification of the hidden edge in third-angle projections of a tetrahedron (see text).

Figure 7: Identification of the hidden edge in third-angle projections of a tetrahedron...

Encyclopædia Britannica, Inc.