Weekly national intelligencer. [volume] (Washington [D.C.]) 1841-1869, 1851-06-07
MECHANISM, No. Iv.-Br Jos1Au HoIBRooK.

4: THE NATIONAL IxTELLIsEKcER.
Trgonometry 10 the science of tangls and more an art
than science The term derived from three Greek words:
tr, three goia and netron, measure. It hence
literally, means the measure Of ranses really and prac-
cay measuring BY trangles So curious, useful and won
derful are the properties Of anges to constitute nstru
ments and furnish modes for measuring any body however
Irregular and whether of one two, three dimensions
length, length and breadth, length breadth, and
thickness They also furnish instruments for measuring
bodies however distant least within the distance Of
the sun, and extended much beyond it. The heights of
the distances Of bodies rivers and the d
mansions Of them, other intervening objects at distance,
we'll those accessible hand by the wonderful
Of angles be determined with great accuracy
and by very simple modes. Surveying, navigation asrono-
engineering, architecture and the squang Of every
building erected have gonomety. one or more
properties Of trianges, At their foundation.
Every three sided figure is called triangle rgon,
anguus being the Latin, and gonna the Greek of the word
ANGLE Three-sded figures of plain Surfaces and
bounded BY straight lines are called plain trianges When
Of curved surfaces and bounded BY curved lines they are called
curved angs When bounded by three great circles Of
sphere, the equator, ecpc, and meridian of the EARTH
hree-sded figure is called spherical triangle, and the
science relating that class Of tsngs Il called spherical
tigonomety that plain triangs called plain trigo-
nomey The properties Of these Two classes Of sided
figures different and distinct and each SO important,
both to science and oconute two separate Sciences
and each important fnot essential to the other
or plain anges there six disren. kinds three DIFF
erng in their sides and three in their angles When all the
sides equal Of the same length, any threesded figure
called equatera triangle When two sides equal,
and either longer shorter than the third. il is called
soscees triangle. When all the sides unequal, Of d
erent lengths II is called scalene triangle. Every plain
triangle, having right angle. no one can have Two,
is called right angle triangle angle obtuse OF
larger than right angle, is called obtuse angle triangle
If all the angles acute, smaller sharper) than right
angle. is called acute angle triangle II triangle have
right angle and two equal Sides It right ansled
soscees Triangle combining the properties both Of anglss
and squares The whole Of the Chinese Puzzl,'
in the right singled soscees triangle. Fifty. or
Of peceso wood paper ivory, porcelain, glass,
or other material n the shape Of right aneed soscelss t
snse say one inch for each Of the Sides csn be COM
bned into forms literally without number usratine natural
and artificial mechanism in forms exceedingly beautiful and
curious and applicable both 10 scientific and business ope
tons, to an extent without. limits. 81 !N
Experiments LET any fischer parent give 10 bis pu-
pills children, forenoon exercise, an excursion for
aiming and collecting mnsEah or other objects Of nature
coming under their On aernoon sIereso
or BOTH The vaou objects Thus coming under the observe
tion If fhsy should And mineral and draw three
sded figure. they would 'ahe bfnnink = b The work Of
one DAY. In Cabinet Of Nature and Art IlusatingAgfi-
euurs and nscn;Sl ana a.. 2. : ;e e .s
raurs are ofsrsd BY shs Maryland sosisy soub!e's
win Be awarded BY any socsy thus hsoed BY the work Oh
young hands and generous minds.