Do Now Take a protractor from the bookshelf
Do Now Take a protractor from the bookshelf. Take a piece of graph paper from the bookshelf. Find your new seat from Wednesday. The scale on a map is 7 cm : 10 km. If two cities are 56 cm apart on the map, what is the actual distance in km between the two cities?
Similar Polygons
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
You know that figures that have the same shape and size are CONGRUENT figures. Figures that have the same shape but not necessarily the same size are SIMILAR figures. Congruent Polygons Similar Polygons
Are all rectangles similar? They have common characteristics, but they are not similar. You can not enlarge or reduce a given rectangle to fit over every other rectangle. What do you think about other types of geometric figures such as squares, circles, and triangles?
What Makes Polygons Similar? the handout
Did you need both conditions?
Practice
Practice
Practice
Practice
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.
- Slides: 21
