1. Math Humor
Q: Who invented fractions?
A: Henry the 1/8!!

2. L.T. 7.1: Write and Simplify Ratios

3. Vocabulary A ratio compares two numbers by division.
a to b, a:b, or , where b 0

4. Example 1

5. Example 2 The ratio of the side lengths of a quadrilateral is
2:3:5:7 and its perimeter is 85 ft. What is the
length of the longest side:
2x + 3x + 5x + 7x = 85
17x = 85
X = 5
So 35

6. Example 3
The ratio of the interior angle measures in a hexagon is 25:9:17:21:40:32. What is the measure of each angle?
144x = 720
X = 5
125, 45, 85, 105, 200, 160

7. Think about it …
Is the ratio 6:7 the same as 7:6? Why or why not? No