Unit 1, Lesson 19# Computing Actual Areas from a Scale Drawing (Continued)

EngageNY 45 min(s)

Given a scale drawing, students compute the area in the actual picture. In this series of examples, students identify the scale factor. As students complete a few more examples, they can be guided to the understanding that the ratio of areas is the square of the scale factor. Use the diagrams below to find the scale factor and then find the area of each figure.