☰
Euclid
Propositions
All
Definitions
Postulates
Common Notions
Playground
P
I.1
Construct an
equilateral triangle
on a given line
P
I.2
Transfer a line
segment to a given
point
P
I.3
Cut off from the
greater a line equal
to the less
T
I.4
SAS congruence
T
I.5
Base angles of an
isosceles triangle
are equal
T
I.6
Converse: equal base
angles imply
isosceles
T
I.7
Uniqueness of
triangle
construction from a
T
I.8
SSS congruence