The eight-line part of a Petrarchan sonnet is the________________

The eight-line part of a Petrarchan sonnet is called the octave. The Petrarchan sonnet is a type of sonnet that consists of 14 lines, and is named after the Italian poet Francesco Petrarch. The octave comes after the first part of the sonnet, which is a set of four lines called the quatrain. The octave is made up of two quatrains that are linked by a common rhyme scheme, usually ABBAABBA. The octave sets up a problem or dilemma that the poet explores or resolves in the final six lines of the sonnet, known as the sestet.