delaney250 delaney250

15-11-2017
Mathematics

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Given: line AB is congruent to line CD and line AD is congruent to line BC. Prove: angle D is congruent to angle B

Given line AB is congruent to line CD and line AD is congruent to line BC Prove angle D is congruent to angle B class=

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Аноним Аноним

15-11-2017

AD = BC ----> Parallel lines
AC = AC -----> Reflexive property
<A = <C -----> Congruent angles
<D = <B -----> Congruent angles

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Anna540 Anna540

15-11-2017

Ac congruent to ac by reflexive property
Triangle acd is congruent to triangle cab by side, side, side
Angle d is congruent to angle b by cpctc (corresponding parts of congruent triangles are congruent) hope this helpef

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