Ratios and You.

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Presentation transcript:

Ratios and You

What are Ratios Ratios are a way to compare two or more quantities

Example 1: How many boys are in the class? How many girls are in the class? What is the ratio of boys to girls?

Example 2: How many Sophomores? How many Freshmen? What is the ratio of Sophomores to Freshmen?

Example 3: Informing decisions A restaurant knows on average that it sells 5 hamburgers to every 2 hotdogs, and has 280 orders daily. The manager needs to restock the freezer to make sure that they have enough items for tomorrow. How many hot dogs and how many hamburgers do they need?

Example 4: Applying it to Segments Mr. Knox is building a triangular garden, and he knows he wants the ratio of the sides to be 3:3:2. If has measured and knows the perimeter of the garden should be 32 ft, how big should each side be?

Example 5: Using Segments A segment is broken into pieces with ratio 5:4:4:3:2:1:1. If the length of the initial segment was 100 units, what are the lengths of the pieces?

Example 6: Apply it to angles! A 120 degree angle is broken into a ratio of 3:2:1. What is the size of the largest angle?

Example 7: Apply it to angles some more! A pie chart is divided into 5 categories with ratio 5:5:4:4:2. What is the measure of the internal angle for each piece?