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Conjugate, from L. conjungo, to yoke or join together ; from L. con, together;
and L. jugum, that which joins, a yoke. Converge, from F. converger, L. con -- with; L. vergo, to bend, or incline. Co-ordinate, from L. Co (con), together; and L. ordo, inis, a straight row, a
regular series. Cube, from L. cubus ; G. kubos, a die. Curve, from L. curvus, a, um, crooked, bent. Cylinder, from G. kylindros; from G. kylindo, to roll. Hence roller-like.
Decagon, from G. deka, ten ; and G. gònia, an angle (corner).
G. gônia, a corner.]
dia, round; and G. graphò, to write or delineate. Diameter, from G. diametros, measurement through ; from G. dia, through ;
and G. metrun, a measure. Dihedral, from G. di, double ; and G. hedra, a base. Dodecagon, from G. dõdeka, twelve ; and G. gônia, an angle (corner). Dodecahedron, from G. dõdeka, twelve; and G. hedra, a base. Duodecimal, from L. duodecim, twelve. [L. duo = two, and L. decem =
Elevation, from L. elevo, to lift up or raise ; from L. e, up; and L. levo, to
raise. Ellipse, from G. elleipsis, a defect or leaving out. [G. elleipo, to leave out.) Equilateral, from L. aequilaterus, equal-sided; from L. aequus, a, um, equal;
and L. latus, lateris, a side. Equivalent, from L. aequus, a, um, equal; and L. valens, valentis, being
strong. [L. valeo = to be strong.]
Hypotenuse, from G. hypoteinousa, the line subtending a right angle; from
G. hypo, under; and G. teino, to stretch.
Icosahedron, from G. eikosi, twenty; and G. hedra, a base.
L. volvo, volutum, to roll.
skelos, a leg.
Line, from L. linea, a linen thread. [L. linum = flax.]
Multilateral, from L. multilaterus, many-sided ; from L. multus, a, um,
many; and L. latus, lateris, a side.
Nonagon, from L. nonus, a, um, the ninth; and G. gònia, a corner.
Parabola, from G. parabolē, a placing beside ; from G. para, from, by the
side of; and G. ballo, to throw. Parallel, from G. para, by the side of; and G. allelos, one another. [G.
allos = another.] Parallelogram, from G. parallēlogrammon, a figure bounded with parallel
sides. [G. grammē = a line.] Penetration, from L. penetro (penetratum), to place or set into. Pentagon, from G. pente, five; and G. gônia, a corner. Perimeter, from G. peri, around; and G. metron, a measure. Periphery, froin G. peri, around; and G. phero, to carry. Perpendicular, from L. perpendiculum, a plumb - line; from L. per,
thoroughly ; and L. pendo, to weigh. Plane, from L. planus, perfectly flat. Point, from L. punctum, a point, or small hole. [L. pungo = to pierce
into ] Polygon, from G. polugonos, a figure having many angles ; from G. polus,
many; and G. gònia, a corner. Prism, from G. prisma. [G. prizo = to saw.]
Problem, from G. problēma, that which is proposed; from G. pro, before ;
and G. ballo, to throw. Profile, from L. pro, forth; and L. filum, a thread. Projection, from L. projicio (projectum), to throw forth or before ; from
L. pro, forth; and L. jaceo, to throw. Proportional, from L. proportio, symmetry, analogy; from L. pro, in com
parison with ; and L. portio, portionis, part, share. Pyramid, from G. pyramis, pyramidos, usually derived from G. pyr, a flame,
because of its pointed shape.
Quadrant, from L. quadrans, -antis, making square ; from L. quadro, to make
square. [L. quatuor = four.] Quadrilateral, from L. quadrilaterus, four-sided; from L. quatuor, four; and
L. latus, lateris, a side.
Radius, from L. radius, a spoke of a wheel.
thread. [L. linum = flax.] Rhombus, from G. rhombos, a wheel thus shaped, and turned on a pivot.
[G. rhembo, to turn round and round.]. Rhomboid, from G. rhombos, and G. eidos, form, shape.
Scale, from L. scala, a ladder, flight of steps. [L. scando, to mnount.]
modern F. carré, square.] Superficies, from L. superficies, the upper side, the top; from L. super,
above; and L. facies, a face.
Tangent, from L. tangens, -entis, touching. (L. tango = to touch.]
L. verto (versum), to turn.
Trapezium, from G. trapezion, dim. of trapeza, a table; contracted either
from G. tri-peza, three-legged; or from G. tetra-peza, four-legged. Trapezoid, from G. trapezion, and G. eidos, shape, form. Trefoil, from F. trois, three; and F. feuille, a leaf. Triangle, from L. triangulus, having three corners; from L. tres, three; and
L. angulus, a corner.
L. latus, lateris, a side.
Vertex, from L. vertex, the top or crown of the head. [L. verto = to turn.]
INDEX TO PROBLEMS IN PLANE GEOMETRY.
Altitude; to find, of given triangle, ... ...
line, ... ... ... ... ... ... ...
given line, ... ... ... ... ... :
being inaccessible; ...
given ciroles in a given point, ...
lines, ... ... ... ... ... ...
given line, ..
; to describe, of given radius, touching two given circles,
-; to describe, about given square, ...
; to draw, touching given circle in given point, also a given line,