how do i get started with this proof Given:triangle ABC is congruent to triangle CDA Prove: ABCD is a parallelogram ( i just need to get started thats all)

Question

how do i get started with this proof Given:triangle ABC is congruent to triangle CDA  Prove: ABCD is a parallelogram ( i just need to get started thats all)

anonymous · Answer

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asnaseer · Answer

Mark which angles are equal in order for ABC and CDA to be conguruent

asnaseer · Answer

that will then lead to the proof

anonymous · Answer

Only two angles have to be congruent in order for the shape to be congruent right?

asnaseer · Answer

all side lengths and all angles must be equal

asnaseer · Answer

between the two triangles

anonymous · Answer

But if you show that at least one set of angle are equal then both triangles are congruent right?

asnaseer · Answer

yes

anonymous · Answer

ohh well i started with the given and <BCA is congruent to <DAC beacause of alternate int angles

asnaseer · Answer

but corresponding sides must also be equal, otherwise they are just similar

anonymous · Answer

yeah and two pairs of angles and parallel lines

asnaseer · Answer

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