The fundamental purpose of the Geometry course is to introduce students to formal geometric proof and the study of plane figures, culminating in the study of right triangle trigonometry, circles and three-dimensional figures. Students begin to prove results about the geometry of the plane by using previously defined terms and notions. Similarity is explored in greater detail, with an emphasis on discovering trigonometric relationships and solving problems with right triangles. This course uses the Big Ideas Math Geometry textbook. Students will investigate, conjecture, validate, generalize, extend, connect, communicate and reflect upon mathematical ideas.