Structural Formulae question:?

Question

Draw a structural formulae for two pairs of geometric isomers having the formula C6H12, displaying the trigonal planar bonding on the C=C in each formula. Please name each isomer.

Answer 1

CH3CH2CH2 .. .. CH3 .. CH3CH2CH2 .. .. H
.. .. .. .. .. .. ..\ .. .. /.. .. .. .. .. .. .. .. .. .. .. ..\ .. .. ../
.. .. .. .. .. .. .. C=C .. .. .. .. .. .. .. .. .. .. .. .. C=C
.. .. .. .. .. .. .. / .. ..\ .. .. .. .. .. .. . .. .. .. .. .. / .. ..\.
.. .. .. .. .. .. .H .. .. H .. .. .. .. .. .. .. .. .. .. H .. .. CH3
.. .. .. .. .. cis-hexene-2 .. .. .. .. .. .. .. trans-hexene-2


.. .. .. .. .. ..CH3 .. .. .. .. .. .. .. .. .. .. .. . CH3
.. .. .. .. .. .. l .. .. .. .. .. .. .. .. .. .. .. .. .. .. .l
.. .. .. .CH3CH .. .. CH3 .. .. .. ...CH3CH .. .. H
.. .. .. .. .. .. ..\ .. .. /.. .. .. .. .. .. .. .. .. .. .. ..\ .. .. ../
.. .. .. .. .. .. .. C=C .. .. .. .. .. .. .. .. .. .. .. .. C=C
.. .. .. .. .. .. .. / .. ..\ .. .. .. .. .. .. . .. .. .. .. .. / .. ..\.
.. .. .. .. .. .. .H .. .. H .. .. .. .. .. .. .. .. .. .. H .. .. CH3
.. . 4-methyl-cis-pentene-2 .. .4-methyl-trans-pentene-2

Answer 2

all trigonal planar means is bonding pairs and no lone pairs.

one isomer is 1-hexene (--means double bond)

H...H.H.H. H. H
H-C--C-C-C-C-C-H
.............H.H..H..H


the other one is 3-methyl 1- propene

H...H.H.H..H
H-C--C-C-C-C-H
...........ch3.H.H

disregard the dots