Does Iambic Pentameter Have To Be 10 Syllables?

Does Iambic Pentameter Have To Be 10 Syllables? “Pentameter” indicates a line of five “feet”. … It is used both in early forms of English poetry and in later forms; William Shakespeare famously used iambic pentameter in his plays and sonnets. As lines in iambic pentameter usually contain ten syllables, it is considered a form