Question: How many syllables are in one line of iambic pentameter?
Disambiguated questions and answers: question: How many syllables are typically in one line of iambic pentameter?
Does one line of iambic pentameter need to have a certain number of syllables?
answer: ten syllables
10
ten
Decasyllable
10 syllable
nor need it have ten syllables
Natural Questions answer: usually contain ten syllables (from the Wikipedia article "Iambic pentameter")