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2,023 reviewed resources for diameter

Lesson Planet

Circumference and Diameter Relationship

For Teachers 6th - 8th Standards
With a ruler and a piece of string, geometers measure the circumference of a circular object. Tracing and folding it, they find the diameter of the resulting circle so that they can relate it to the circumference. It is recommended that...
Lesson Planet

Inscribed Angle on Diameter

For Students 9th - 12th Standards
What is the relationship between inscribed angles associated with the diameter? Given a triangle inscribed in a circle with the diameter as one side, pupils find the measure of two angles using a combination of the formula for the...
Lesson Planet

Measure the Solar Diameter

For Teachers 7th - Higher Ed Standards
Scientists could measure the diameter of the sun before they knew its distance. Scholars construct a simple mirror box to measure the diameter for themselves. They compare this measurement with the official size, listed in a textbook,...
1 In 1 Collection
EngageNY

Circles, Chords, Diameters, and Their Relationships

For Teachers 9th - 10th Standards
A diameter is the longest chord possible, but that's not the only relationship between chords and diameters! Young geometry pupils construct perpendicular bisectors of chords to develop a conjecture about the relationships between chords...
Lesson Planet

Circumference and Areas of Circles

For Teachers 7th - 12th Standards
Middle and high schoolers listen to a scenario about a puppy and use the scenario to develop formulas in order to find the area of a circle. In this circumference lesson, pupils understand how to find the radius, diameter, area of a...
Lesson Planet

Diameter and Circumference of a Circle

For Teachers 10th
Tenth graders explore circles.  In this geometry lesson, 10th graders explore the relationship between a circle’s circumference and its diameter.  The dynamic nature of the technology allows students to verify the circumference formula...
Lesson Planet

Transportation, Distribution, and Logistics: Tire and Wheel Assemblies

For Teachers 6th - 12th Standards
Is bigger really better? By the end of this lesson, 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...
Lesson Planet

Circles Notes: Diameter, Radius, Circumference, and Area

For Students 6th - 9th Standards
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...
Lesson Planet

Bubble Mania

For Teachers K - 5th
Elementary schoolers practice measuring a soap bubble print. They follow a recipe to make a soap bubble solution. Pupils use the soapy solution to blow large bubbles with a plastic drinking straw until they pop leaving behind a circular...
4:01
Lesson Planet

How Do You Find the Area of a Circle if You Know the Diameter?

For Teachers 6th - 8th
Do you know the formula to find the area of a circle? Do you know the value of pi? Do you know what the relationship is between diameter and radius? Yes? Then you can solve this problem. If your scholars don't know this formula then this...
11:05
Lesson Planet

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...
8:37
Lesson Planet

Test 2 Section 2 Part 5

For Students 9th - 12th
Both algebra and geometry problems are featured in this SAT practice video. Students who have a hard time transitioning between skills on tests (average mean, then diameters and pi, then positive integers) would benefit from Sal's deft...
Lesson Planet

The Moons of Jupiter

For Students 6th - 8th Standards
Middle schoolers analyze given data on density and diameter of objects in space by graphing the data and then discussing their findings. This ninth installment of a 22-part series emphasizes the Galilean moons as compared to other objects. 
1 In 1 Collection
EngageNY

The Most Famous Ratio of All

For Teachers 7th Standards
Pupils develop a definition of a circle based upon its radius in the 17th segment of a 28-part series. They determine the relationship between the radius and the diameter of a circle. To round out the instructional activity, they use the...
Lesson Planet

Neptune

For Teachers 6th - 10th Standards
Examine an innovative approach to a large-scale model. Pupils across the state of Maine teamed up to create a model of the solar system that spans 40 miles. Put thinking skills to work within your classes as they make the calculations to...
11:05
Lesson Planet

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...
Lesson Planet

Circle Problems - Radius, Diameter, Circumference and Area

For Students 9th - 12th
In this online math worksheet, 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. A...
1:52
Lesson Planet

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.
Lesson Planet

Radius, Diameter and Circumference

For Teachers 8th - 10th
In this circle worksheet, students use a drawing of a circle. The diameter is given. Students find the radius, circumference and area of the circle. On the second problem, students are shown a circle with a hole inside it. They compute...
7:58
Lesson Planet

Circles, What Is Pi?

For Students 4th - 8th Standards
Understanding the basic of circles is as easy as pi. The resource introduces the definition of a circle along with its dimensions, circumference, diameter, and radius. Using graphics, the video shows the approximation of pi and how to...
Lesson Planet

The Circumference and Diameter of a Circle

For Teachers 9th
Ninth graders investigate the finding of the diameter of a circle in order to extend the practice towards finding the circumference. They differentiate between the distance measured across a circle from that of around the perimeter.
Lesson Planet

Circles: Radius, Diameter, Area, and Circumference

For Students 9th - 12th
In this circles worksheet, students answer 12 questions about circles. Students find the radius, diameter, circumference, and area of three circles given a diagram.
Lesson Planet

Circles, Circles, Everywhere!

For Teachers 9th - 12th
Students explore the concept of circles.  In this circles lesson, students use their Ti-Nspire to collect data on various circles of different sizes.  Students measure the diameter and circumference of the circles and plot the data in a...
Lesson Planet

Circumference of a Circle

For Students 6th - 9th Standards
Save trees and practice calculating the circumference of circles with this online interactive task! Of course, if you want individuals to turn it in, you will still need to print copies. There are 20 problems to solve, all of which...

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