Geometry proof worksheets with diagrams and blank tables for logical reasoning.

PROOF #3
1) ∠C ≅ ∠D, ∠1 ≅ ∠2, CE ≅ DE
2) ∠CEA ≅ ∠DEB
3) △CEA ≅ △DEB
4) ∠CAE ≅ ∠DBE
5) ∠CAB ≅ ∠DBA

1) Given
2) Vertical Angles Theorem
3) AAS Congruence Postulate
4) CPCTC
5) Angle Addition Postulate and substitution

PROOF #4
1) BD bisects ∠ABC, BD bisects ∠ADC
2) ∠ABD ≅ ∠CBD, ∠ADB ≅ ∠CDB
3) BD ≅ BD
4) △ABD ≅ △CBD
5) AB ≅ CB, AD ≅ CD
6) AB + AD = CB + CD

1) Given
2) Definition of angle bisector
3) Reflexive Property
4) ASA Congruence Postulate
5) CPCTC
6) Addition Property of Equality