Given: ADFE is isosceles with base FE; FB EC.
Prove: ADFB – ADEC
Complete the missing parts of the paragraph proof.
D
We know that triangle DFE is isosceles with base FE
and that segment FB is congruent to segment EC
because
Segment DF is congruent to segment by the
definition of isosceles triangle. Since these segments
are congruent, the base angles, angles
are congruent by the isosceles
triangle theorem. Therefore, triangles
are congruent by SAS.
F
C
B
E
Intro
Done