Which of the following choices describe the bases of a cylinder? check all that apply. a. discs b. parallel c. similar d. congruent

In mathematics, two geometric figures are "congruent" if they have the same sides and the same size; if there is an isometry that relates them: a transformation that can be of translation, rotation and / or reflection.
 It can also be said that both bases are parallel since all the points of both bases are at the same distance from each other. 
 They can also be defined as two disks since both have the same area as a disk A = pi * r ^ 2 and they also have the same mathematical equation as a disk.
 We have then that the answer is then:
 b. parallel 
 d. congruent
 a. discs
 
 a. discs
 d. congruent
 b. parallel

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