Radius Teacher Resources

Find Radius lesson plans and worksheets
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High School Balanced Packet 2 Assessment Tasks

For Students 9th - 12th Standards
Good assessments can be hard to find and difficult to formulate. Designed as a collection of mathematics assessment tasks, the 20 resources in this packet can also be used as lesson openers, a review, or extra practice. The open-ended...
28 Items in Collection
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The Periodic Table

For Teachers 7th - 11th Standards
Whether you're giving a broad introduction to the periodic table or honing in on particular element groups, this collection will have what you need. I've put the general resources at the front, and resources that focus on particular...
9 Items in Collection
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Grade 7, Claim 1: Concepts and Procedures Item Slide Shows

For Teachers 7th Standards
Prepare seventh graders for end-of-year assessments with a collection of nine resources packed with teacher and student-friendly slides featuring problems that address the A-I competencies. Questions are modeled after Smarter Balanced...
12 Items in Collection
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Math Antics Geometry Video Lessons

For Teachers 4th - 8th Standards
The point of this collection of 12 videos is to introduce learners to three basic parts of geometry—points, lines, and planes. The presenter provides definitions, shows how to classify shapes, provides examples, and shows how to use...
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Mathematics Assessment Project: Tests for College & Career Readiness - High School

For Teachers 9th - 12th
A collection of six tests are designed to assess the College and Career Readiness of high school algebra I, algebra II, geometry, and statics and probability learners. Each assessment includes the test form and scoring and comes in 40,...
3:43
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How Do You Find the Radius of a Circle if You Know the Circumference?

For Teachers 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...
11:05
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Circles: Radius, Diameter and Circumference

For Students 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...
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Complete the Square for Center-Radius 2

For Students 9th - 12th Standards
Squares and circles go hand in hand. Scholars determine the center and radius of a circle given an equation in standard form. The problem involves an equation with coefficients greater than one.
3:19
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How Do You Find the Area of a Circle if You Know the Radius?

For Teachers 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...
11:05
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Circles: Radius, Diameter and Circumference

For Students 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...
3:25
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Radius and Tangent – Proof

For Students 6th - 12th Standards
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...
1:52
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Radius, Chord, Diameter, and Secant

For Teachers 9th - 12th
What do a secant, chord, diameter, and radius all have in common? They are all components or measurements of a circle! This clip quickly defines each of these terms using verbal, written, and diagram examples.
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Tangent Lines and the Radius of a Circle

For Teachers 9th - 12th Standards
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. 
3:55
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Find the Radius of a Circle Given the Area (Example)

For Students 7th - 11th Standards
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...
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Area of a Circle When Radius is Given

For Students 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...
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Calculate the Radius

For Students 6th
In this calculating radius worksheet, 6th graders find the radius of 5 circles given the circumference information. Students must write the radius on the line provided and a box is provided to them to show their work. 
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Radius of a Cylinder

For Teachers 8th - 12th Standards
Here is a multiple choice question that would make a good assessment question. Algebra students are to look at the structure of the formula for a given radius of a cylinder and find the resulting radius when the height of the cylinder...
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Restricted Domain and Range: Restricted Circle Radius and Area

For Students 9th - 12th Standards
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...
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Tangent Line and Radius

For Students 9th - 12th Standards
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...
6:48
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Equation, Center and Radius, and Intercepts of a Circle

For Students 9th - 12th Standards
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...
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Size of Atoms - Trends

For Teachers 9th - 12th
This compendious collection of slides leaves no questions when it comes to the concept of atomic size. Thorough and easy-to-read graphs, tables, and graphics explain atomic radii, the shielding effect, the octet rule, isoelectric...
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Discovering Pi/Welcome to Pi Day

For Teachers 9th - 12th
Students explore pi. In this circle measurement lesson plan, students define and identify radius, diameter, circumference, and perimeter. Students work in groups to measure several plastic lids and record their findings. Students compare...
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Find Radius of the Circles

For Students 5th - 6th
In this finding the radius of circles worksheet, students must calculate the radius of 4 circles. Students are given diameter and must write the radius on the line for each circle. 
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Circumferences, Diameters, and Radii

For Teachers 5th - 8th
Learners explore circumferences, diameters, and radii. In this math lesson plan, students measure circumferences in inches and compute radii and diameters, given different circumferences.

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