orthocentreorthocentern.

Brit.

/ˈɔːθə(ʊ)sɛntə/, U.S.

/ˈɔrθoʊˌsɛn(t)ər/

Forms: 1800s– orthocentre, 1800s– orthocenter (U.S.).

Origin: Formed within English, by compounding. Etymons: ortho- comb. form, centre n.¹

Etymology: < ortho- comb. form + centre n.¹ (see quot. 1866).

Geometry.

The point of intersection of the three perpendiculars drawn from the vertices of a triangle to the opposite sides.

ΘΚΠ

the world > relative properties > number > geometry > point > [noun] > forming a centre > of a triangle

orthocentre1866

symmedian point1885

1866 N. M. Ferrers Trilinear Co-ordinates vi. 119 It may be convenient to call the point of intersection of the perpendiculars let fall from the angular points of a triangle on the opposite sides, the orthocentre of the triangle.

1896 Amer. Math. Monthly 3 329 H is the orthocenter of triangle ABC.

1903 E. H. Askwith Course Pure Geom. i. 12 The pedal triangle has for its incentre the orthocentre of the original triangle.

1996 Amer. Math. Monthly 103 319 The circumcentre O, centroid G and orthocentre H of a triangle are collinear in the Euler line.

This entry has been updated (OED Third Edition, September 2004; most recently modified version published online March 2022).

单词	orthocentre
释义	orthocentreorthocentern. Brit. /ˈɔːθə(ʊ)sɛntə/, U.S. /ˈɔrθoʊˌsɛn(t)ər/ Forms: 1800s– orthocentre, 1800s– orthocenter (U.S.). Origin: Formed within English, by compounding. Etymons: ortho- comb. form, centre n.¹ Etymology: < ortho- comb. form + centre n.¹ (see quot. 1866). Geometry. The point of intersection of the three perpendiculars drawn from the vertices of a triangle to the opposite sides. ΘΚΠ the world > relative properties > number > geometry > point > [noun] > forming a centre > of a triangle orthocentre1866 symmedian point1885 1866 N. M. Ferrers Trilinear Co-ordinates vi. 119 It may be convenient to call the point of intersection of the perpendiculars let fall from the angular points of a triangle on the opposite sides, the orthocentre of the triangle. 1896 Amer. Math. Monthly 3 329 H is the orthocenter of triangle ABC. 1903 E. H. Askwith Course Pure Geom. i. 12 The pedal triangle has for its incentre the orthocentre of the original triangle. 1996 Amer. Math. Monthly 103 319 The circumcentre O, centroid G and orthocentre H of a triangle are collinear in the Euler line. This entry has been updated (OED Third Edition, September 2004; most recently modified version published online March 2022). < n.1866
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