Practice Questions on Concentric Circles
Question 1: Two concentric circles have radii 20 cm and 25 cm. Find the perimeter of the region between these circles?
Question 2: Given the larger circle’s radius as 18 units and the area between the circles as 200π sq. units, what is the radius of the smaller circle?
Question 3: Two concentric circles have radii 40 cm and 50 cm. Find the perimeter of the region between these circles?
Question 4: If the radii of two concentric circles are 15 cm and 8 cm respectively, determine the difference between the areas of the two circles?
Question 5: If the radii of two concentric circles are 20 cm and 22 cm respectively, determine the difference between the areas of the two circles?
Concentric Circles
Concentric circles are defined as two or more circles that share the same center point, known as the midpoint, but each has a different radius. If circles overlap yet have different centers, they do not qualify as concentric circles. According to Euclidean Geometry, two concentric circles must have two different radii. The space between the circumference of these two circles is called the annulus of a circle.
In this article, we will learn about concentric circles, the theorem on concentric circles, the region between the concentric circles, Concentric Circle Equations, and Concentric Circles examples in detail.
Table of Content
- What are Concentric Circles?
- Concentric Circles Meaning
- Concentric Circle Examples
- Region between Two Concentric Circles
- Concentric Circle Theorem
- Concentric Circle Equations
- Solved Examples on Concentric Circles
- Practice Questions on Concentric Circles