The proof that δabc ≅ δcda is shown.

given: ∥ and ∥
prove: δabc ≅ δcda

what is the missing reason in the proof?

statements reasons
1. ab ∥ cd; bc ∥ da 1. given
2. quadrilateral abcd is a ▱ 2. definition of parallelogram
3. ab ≅ cd; bc ≅ da 3. opposite sides of a parallelogram are ≅
4. ac ≅ ac 4. reflexive property
5. δabc ≅ δcda 5. ?

a. perpendicular bisector theorem

b. pythagorean theorem

c. hl theorem

d. sss congruence theorem

The jurassic zoo charges $14 for each adult admission and $5 for each child. the total bill for 77 people from a school trip was $565. how many adults and how many children went to the zoo? i

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