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DEMONSTRANDA (I)
1. There will be some New Propositions to be proved before Preparatory Prop.
Axioms changed to.
any of Euclid's these may be called Preparatory Propositions.
Some of these Axioms will be canged into these.
—
2. All Lines drawn from one line to another which is parallel concerning Parallel
Lines
to it, if they make equal angles with the parallel lines
are equal.
—
3 A Triangle can not have more than one right or obtuse
angle, wherefore it must have 3 acute ones. concerning Angles
of Triangles
These are the reasons for calling Triangles which
have one right angle a right angled Triangle, those
that who have one obtuse angle obtused angled
but those that have 3 acute angles Acute angled.
—
4 If the lid boundaries of any square angled Figure be Exteriour Square
Angles
produced the exteriour angles which the produced parts
make with each other shall be square also. Demonstrated by Prop XV.
—
5 A Figure must have as many sides as it has Sides equinumeral
to Angles
Angles
—
6 Equilateral Triangles must be acute also. Equilateral
Triangles Acute
—
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DEMONSTRANDA (I.)
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Identifier:  JB/135/016/002 "JB/" can not be assigned to a declared number type with value 135.



16 

135 

016 
demonstranda (i) 

002 

copy/fair copy sheet 
2 

recto 

sir samuel bentham 
[[watermarks::gr [with crown] [britannia motif]]] 

46134 
