Lesson 15: Practice Problems

Problem 1

The -axis of each graph has the diameter of a circle in meters. Label the -axis on each graph with the appropriate measurement of a circle: radius (m), circumference (m), or area (m²).

3 graphs with diameter(m) on the x axis. The first graph is a curved line from 0. The second is a straight line increasing slowly from 0 and the third is a steeper straight line.

Problem 2

A circle’s circumference is approximately 76 cm. Estimate the radius, diameter, and area of the circle.

Problem 3

Jada paints a circular table that has a diameter of 37 inches. What is the area of the table?

Problem 4

Point is the center of the circle, and the length of is 15 centimeters. Find the circumference of this circle.

A circle with center A and diameter, CD is 15. There are radius lines AE, AG, and AD

Problem 5 From Unit 5 Lesson 13

The Carousel on the National Mall has 4 rings of horses. Kiran is riding on the inner ring, which has a radius of 9 feet. Mai is riding on the outer ring, which is 8 feet farther out from the center than the inner ring is.

  1. In one rotation of the carousel, how much farther does Mai travel than Kiran?

  2. One rotation of the carousel takes 12 seconds. How much faster does Mai travel than Kiran?