ADCD by definition
of a midpoint
ABCB by definition
of a midpoint
ZBDA
ZBDC
because all right angles
are congruent
LA Cis
given.
D is the
midpoint of AC
is given.
AC1 BD is
given.
ABCB by CPCTC
ZABDZCBD
because all right angles
are congruent.
AABD ACBD
by ASA
AABC is an
isosceles
triangle
