Can anyone help with this please

In the figure below, segment ac is congruent to segment ab: triangle abc with a segment joining vertex a to point d on side bc. side ab is congruent to side ac which statement is used to prove that angle abd is congruent to angle acd? segment ad bisects angle cab. triangle acd is similar to triangle abd. segment ad is congruent to segment ac. angle cab is congruent to angle cba.

An equation where variables are used to represent known values—function notation true or false

Which undefined geometric term is described as a location on a coordinate plane that is designed by an ordered pair (x,y) ?