The unit contains 19 lessons and two formal assessments. This unit addresses two essential questions:How do we use mathematics to find the height of things that are difficult to measure? How do we make a convincing argument?The High School Common Core State Standards addressed are: Geometry: Similarity, Right Triangles, and Trigonometry (G.SRT)1,2,3,4,5,6,8Geometry: Congruence (G.CO) 7,8Math Mathematical Practices (MPS) 1,2,3,4,5,6,7