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# JB/135/165/001

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4

H Jan 3. 1832 Posology.

Observations on
Definitions
in of Euclid
Stone's Euclid

27. Amongst right three sided figures that
is a right-angled triangle which has
a right angle.

No triangle that can be seen can
have more than one right angle &
this defines what seems to be intended by this
definition is that right angled triangles with
more than one are not inconsistent.

28. Unnecessary as in Euclid

29. An acute angled triangle is
that all the angles of which are
necessarily acute. A triangle

A triangle may have its three
angles acute angles: but in a right
angled triangle & in a obtuse-angled
triangle two angles cannot but be
acute.

30 Amongst four-sided figures that is
a square whose sides are all equal
to one another & its angles are right
angles & equal to each other.

31. That is an oblong the angles of
which are right angles but the sides not
equal sided although the opposite
sides are equal.

32. That a rhombus the sides are
equal but not right angled & of each pair of angles
the two opposite are equal to each
other & in each pair Of the four angles of which it
is
are contained in it two are equal
to one another but not to the
other pair.

Identifier: | JB/135/165/001
"JB/" can not be assigned to a declared number type with value 135.

1832-01-03

135

posology

165

posology

001

text sheet

1

recto

d4

jeremy bentham

street & co 1830

antonio alcala galiano

1830

46283