Radius Teacher Resources
Find Radius lesson plans and worksheets
Showing 1 - 24 of 1,810 resources
Radius and Tangent – ProofLesson Planet
3 mins 6th - 12th CCSS: Adaptable
A tangent line always finds its place at a 90-degree angle to a radius. Many scholars struggle with the proof of the seemingly simple statement. A brief video demonstrates the reasoning behind the proof before pupils practice applying it...
Tangent Lines and the Radius of a CircleLesson Planet
9th - 12th CCSS: Designed
Your Geometry learners will collaboratively prove that the tangent line of a circle is perpendicular to the radius of the circle. A deliberately sparse introduction allows for a variety of approaches to find a solution.
How Do You Find the Area of a Circle if You Know the Radius?Lesson Planet
3 mins 6th - 8th
There are basically two things you need to know to find the area of a circle. First, you need to use the correct formula. Second, you have to know the value of the radius. If you know these two things then all you have to do is plug the...
Equation, Center and Radius, and Intercepts of a CircleLesson Planet
7 mins 9th - 12th CCSS: Adaptable
Working with standard equations is essential to mathematics. The instructor shows pupils how to apply the equation of a circle to determine the center, radius, and intercepts of a circle. Learners then view three examples that...
Find the Radius of a Circle Given the Area (Example)Lesson Planet
4 mins 7th - 11th CCSS: Adaptable
Work backwards if you dare. Scholars view a video to learn how to apply the area formula of a circle to solve problems. They watch an example where the focus is finding the radius of a circle given its area, requiring the use of inverse...
Restricted Domain and Range: Restricted Circle Radius and AreaLesson Planet
9th - 12th CCSS: Designed
There's no restriction to how much your class can learn about domain and range. Users of an interactive adjust the radius of a circle to see its effects on the area. They note how restrictions in the domain (radius) relate to...
Tangent Line and RadiusLesson Planet
9th - 12th CCSS: Designed
Explore the relationship between a tangent line and the radius of a circle. Scholars create a drawing that they analyze to determine the connection between a tangent line and radius. The open-ended question allows for multiple solution...
How Do You Find the Radius of a Circle if You Know the Circumference?Lesson Planet
4 mins 5th - 8th
So you know the circumference of a circle but not the radius. This tutorial shows you two different formulas commonly associated with circles, determines which formula to use, then puts the formula to work. You'll have no problem...
Area of a Circle When Radius is GivenLesson Planet
5th - 8th
Five problems provide practice for learners to find the area of a circle given the distance of the radius. Answers on the key use pi as a variable and do not include fully computed numeric answers. To reinforce basic multiplication facts...
AP Chemistry Topic 5: Bonding, Part FLesson Planet
10th - 12th
Diagrams of unit cell types are provided, as well as formulas for calculating their radii. On the second page is a picture of unit cell models that might not photocopy well. For this reason, you might find this most useful to project in...
How Do You Find the Volume of a Sphere?Lesson Planet
5 mins 6th - 12th
The formula for the volume of a sphere is - volume equals four thirds pi times the radius cubed. That's a mouth-full. But if you are given the radius value of the sphere, all you have to do is plug it in and do the arithmetic. Just...
Circles: Geometry Review WorksheetLesson Planet
10th CCSS: Adaptable
Tenth graders solve and complete 14 different geometry problems. First, they find the area and circumference of a circle with a given radius. Then, they find the area between a circle and an inscribed equilateral triangle given the...
Circle Problems - Radius, Diameter, Circumference and AreaLesson Planet
9th - 12th
In this online math learning exercise, students determine the radius, circumference, diameter and area of circles. This excellent resource allows the students to check their answers, and to get "hints" should they run into difficulties....
Circles: Radius, Diameter and CircumferenceLesson Planet
11 mins 4th - 11th
Fascinating discussion regarding the origin of Pi accompanies a detailed explanation of how to find the circumference of a circle. Since this is the first installment in a series on circles, the concept of circumference is separated into...
Circles Notes: Diameter, Radius, Circumference, and AreaLesson Planet
6th - 9th CCSS: Adaptable
A note-taking sheet and homework are paired up in this resource. Through both, your class will learn the definitions for the diameter, radius, area, and circumference of a circle. The notes guide also displays the formulas for computing...
How to Find the Center and Radius of a CircleLesson Planet
6 mins 11th - Higher Ed CCSS: Adaptable
Working with conic sections is algebraically intense. Use this video to remind learners of the process of writing a conic in standard form to aid in finding its key features. It explains the steps to writing a circle equation in standard...
Transportation, Distribution, and Logistics: Tire and Wheel AssembliesLesson Planet
6th - 12th CCSS: Designed
Is bigger really better? By the end of this activity, learners will be able to apply formulas for computing the diameter of tires and wheel assemblies. Begin by showing a slide presentation that will review definitions for radius and...