Do Now Take a protractor, graph paper and your calculator from the bookshelf. Write two sentences about what it means for two polygons to be similar. Solve the following problem for w, x, y and z
Similar Polygons Continued
Announcements 11. 1 Worksheet due tomorrow. No late work will be accepted this semester. Sign up calendar for “Do Now” will be passed around tomorrow.
Today’s Objectives Develop a definition and an intuitive concept of similarity Define similar polygons Use the definition of similar polygons to solve problems Use problem solving skills
Scale Factor The number you multiply by a side length of one polygon to get the corresponding side length of a similar polygon. Doesn’t change from one pair of corresponding sides to another in the same figure. Greater than 1 if you’re going from smaller to larger. Less than 1 if you’re going from larger to smaller.
What’s the scale factor? Between these two figures? From the first to the second? From the second to the first?
Dilations on a Coordinate Plane
Practice
Practice
Practice
Practice
Today’s Objectives Develop a definition and an intuitive concept of similarity Define similar polygons Use the definition of similar polygons to solve problems Use problem solving skills
Exit Slip 1. Find the missing side lengths. Explain. 1. Determine whether or not the polygons are similar. Explain why or why not.