Unit 3, Lesson 16
Drawing Proportional Circles
Integrated Math 3
16.1
Warm-up
A Circle Twice as Big
Circle
Sign in to view assessments and invite other educators
Sign in using your existing Kendall Hunt account. If you don’t have one, create an educator account.
Circle
The map shows the population of the 10 most populous cities in the United States according to the 2020 census. 1 square unit of area is equivalent to 1 million people.
| city | population | area | radius |
|---|---|---|---|
| New York, NY | 8,804,190 | ||
| Los Angeles, CA | 3,898,747 | ||
| Chicago, IL | 2,746,388 | ||
| Houston, TX | 2,304,580 | ||
| Phoenix, AZ | 1,608,139 | ||
| Philadelphia, PA | 1,603,797 | ||
| San Antonio, TX | 1,434,625 | ||
| San Diego, CA | 1,386,932 | ||
| Dallas, TX | 1,304,379 | ||
| San Jose, CA | 1,013,240 |
The size of a circle could refer to its area or its radius. Because scaling all distances by a factor of
Whether you are using a compass or technology to draw a circle, it is usually important to know the radius of the circle. If you know the area of a circle, finding the radius requires using a square root.