Daniil geometry

ABC = DEF

• Def of congruent angles

• Def of bisect

• Vertical angles

• 3rd angle therome

<1=<2

• All right Angles are congruent

• Def of congruent angles

• Def of bisect

• Vertical angles theriom

BD bisects <ABC

• Definition of congruent angles

• Def of bisect

• Vertical angles theriom

• Definition of perpendicular

<1 = <2

• Def of congruent angles

• 3rd angle theriom

• Vertical angles theriom

• Def of bisect

<C = < F

• Reflexive property

• symmetric property

• All right angles are congruent

• 3rd angle theriom

BD = BD

• Symmetric property

• Reflexive property

• Vertical angles theriom

• Def of bisect

BC = DC

• Def or bisect

• Def of congruent angles

• Def of perpendicular

• Alt int angles theriom

<A = <E, <B = < D

• Alt int angles theriom

• def of perpendicular

• Symmetric properties

• Def of bisect

<1 and <2 are right angles

• Definition of congruent angles

• Reflexive property

• Def of perpendicular

• 3rd angles theriom

BC = CB

• Symmetric property

• Vertical angles theriom

• Definition of bisect

• Def of perpendicular