Unit 3 Triangles Lesson 1 Ratios Proportions and

Unit 3: Triangles Lesson 1: Ratios, Proportions and Similar Figures

Lesson 1: Ratios, Proportions and Similar Figures Ratios: a relationship between two numbers indicating how many times the first number contains the second. For example, if a bowl of fruit contains eight oranges and six lemons, then the ratio of oranges to lemons is eight to six (that is, 8: 6, which is equivalent to the ratio 4: 3). Example 1: The total number of students who participate in sports programs at central high school is 520. The total number of students in the school is 1850. Find the athlete to student ratio.

Lesson 1: Ratios, Proportions and Similar Figures › Proportion: two ratios that have been set equal to each other; a proportion is an equation that can be solved. › When I say that a proportion is two ratios that are equal to each other, I mean this in the sense of two fractions being equal to each other.

Lesson 1: Ratios, Proportions and Similar Figures

Lesson 1: Ratios, Proportions and Similar Figures: • Two figures that have the same shape and size • Ratios of the lengths of the corresponding sides are equal

Lesson 1: Ratios, Proportions and Similar Figures Notation:

Lesson 1: Ratios, Proportions and Similar Figures

: Lesson 1: Ratios, Proportions and Similar Figures Example: Determine whether the given figures are similar Scale Factor: In the example, the scale factor of �� ABC to �� RST is _____. The scale factor of �� RST to �� ABC is _____. Similarity Statement:

Lesson 1: Ratios, Proportions and Similar Figures You Try!

Homework: Lesson 1 Homework Worksheet