This packet is part of my series: Writing about Mathematics – Geometry. This particular activity is about basic vocabulary.Students need to be familiar with the words: line, segment, ray, angle, endpoint, infinite, finite, and vertex.In this packet I have included two copies of the activity that could be used in two different ways.For more advanced students, you can have them write their own paragraph using the given words. Perhaps you would like them to underline or highlight the words as t