This Fluency Activity is a part of the Lesson 8, Unit 4, Grade 4. This fluency activity reviews terms from Lesson 7. If students do not recognize that the middle letter of the angle denotes the vertex, then quickly review. Then, guide students to set a goal for the Sketch Angles Fluency Practice. An appropriate goal may be to consistently label the vertex as the middle letter of the angle. Additionally, some students may benefit from sketching a 90 degree angle as a reference point for each angle.