It depends on your dialect. In the British "received pronunciation", the final vowel is a short i, like the vowel in "sick". In American English it's a long e, like the vowel in "seek".
The last sound in the last syllable of symmetry is "ree."
/k/
the K sound aka a hard C sound K as in key
The last sound of the first syllable in "abscess" is the "s" sound.
The last sound of the last syllable is a hard "c", pronounced /k/
A final syllable is the last syllable in a word. For example, in the word syllable, the syllables are syl-la-ble. The -ble would be the final syllable.
The last sound of the first syllable of the word "ricochet" is the "sh" sound.
The last sound of the first syllable of the word "ricochet" is the "k" sound.
The last sound you would hear in the last syllable of "timorous" is "us."
The last sound you hear in the first syllable of the word "ricochet" is the sound "sh".
The last sound of the first syllable in the word "ricochet" is the vowel sound "e."
The last sound of the third syllable in the word "tangible" is "j".