For items 15 -16 refer to the figure at the right 15. Which is the common side of Ļ BCA and Ļ ACD ?
A. segment BC B. segment CE C. segment AC D. segment CD
16. Which two angles are congruent if segment CD bisects ĻACE
A. Ļ BAC and ĻACE B. Ļ BAC and ĻACD C. Ļ CDE and ĻACE
D. Ļ ACD and ĻCDE
17. What property is described in the statement: AB ≅ AB?
A. transitive B. reflexive C. substitution D. symmetric
18. Which term refers to the collection of axioms or statements about undefined terms?
A. numeral system B. postulates C. axiomatic system D. theorems
19. What basic geometric principle are proven to be true by making connections between accepted definitions?
A. axioms B. postulates C. theorems D. defined terms
20. Which statements are assumed to be true without any proof ?
A. undefined terms B. postulates C. theorems D. defined terms