What type of poem consists fourteen lines iambic pertameter?

A sonnet is a poem that consists of fourteen lines, usually in iambic pentameter. Sonnets are often written in a specific rhyme scheme, with the most common being the Petrarchan (or Italian) sonnet and the Shakespearean (or English) sonnet. The Petrarchan sonnet is divided into an eight-line opening section (the octave) and a six-line conclusion (the sestet). The rhyme scheme for the octave is typically ABBA ABBA, and the rhyme scheme for the sestet is typically CDECDE or CDCDCD. The Shakespearean sonnet is divided into three quatrains, each with a rhyme scheme of ABAB CDCD EFEF, followed by a final rhyming couplet (GG).