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2
H Jany. 3, 1832. Posology
Euclid's
Definitions
/ from Stone's Euclid
17. The two parts into which this
line divides the circle are equal to
each other.
17. A diameter of a circle is a
right line drawn through the circle &
terminated on each side by the circumference
& divides the circle into two
equal parts.
The two parts into which this line
divides the circle are equal to each other.
Unexceptionable
18. A semicircle is a figure contained
between a diameter & that part of the
circumference of a circle cut off by that diameter.
19. A segment of a circle is a figure
contained between a right line & part
of the circumference to a circle.
20. S A Sector of a circle is a wedged
formed figure having for its boundaries
any two lines by which an angle is being equal to
each other are the boundaries of an angle:
then for its other boundary it has
the corresponding portion of the circle:
it has as also the a right line which is
the secant of that same circle. In as
much as the two ends the parts of each end of the secant are is common
to that & the correspondent end of the portion of the
the boundaries of that same secant
& the portion of the circle
of the same line. cut off by it.
In this case the term sector is applied
to a portion of a circle but with equal
propriety it may be applied to a
portion of a sphere: for a sector as
applied to a portion of a circle see — —
also as applied to a sphere see — —
Identifier:  JB/135/167/001 "JB/" can not be assigned to a declared number type with value 135.



18320103 

135 
posology 

167 
posology 

001 

text sheet 
1 

recto 
d2 

street & co 1830 

antonio alcala galiano 

1830 

46285 
