What is the name of the poetic form which Shakespeare uses for the prologue? How many line are there? Mark the rhyming pattern.

The prologue of Romeo and Juliet is a sonnet, also known as an Elizabethan  or Shakespearean sonnet.

There are 14 lines, iambic pentameter, three quatrains, and a rhyming couplet, rhyme scheme: abab, cdcd, efef, gg.