This video lesson on finding Unknown Angle Measures. In this lesson, students build on their learning of angle measurements and apply their knowledge to finding the measure of unknown angle measures. This video is 4 minutes 43 seconds in length. This Lesson is aligned to Lesson 11.5 in the Grade 4 Go Math This video can be used in the classroom or posted on a teacher's website to be viewed at home to reinforce instruction. Great for students to view while doing homework, studying for test, or t