Chapter 11, Problem 30P

Describe the molecular geometry expected for $\text{1,2,3-butatriene}$

${\text{(H}}_{\text{2}}{\text{C=C=C=CH}}_{\text{2}})$

Two stereoisomers are expected for $\text{2,3,4-hexatriene}$

${\text{(CH}}_3{\text{CH=C=C=CHCH}}_{\text{3}})$

What should be the relationship between these two stereoisomers?