Worksheet
Curated OER

Max/Min Problems for Review

For Students 11th - 12th
In this Algebra II/Pre-Calculus worksheet, students determine the points of inflections for various functions and use the answers to complete a riddle.  The one page worksheet contains seven problems.  Answers are included. 
Worksheet
Curated OER

STEREO Watches the Sun Kick up a Storm!

For Students Higher Ed
In this solar storm activity, students use images of a solar tsunami to determine the size and speed of the wave. This activity has 5 problems to solve.
Lesson Plan
Curated OER

Dilations of 2 and 3 dimentional figures and their effect on area, surface area, and volume.

For Teachers 7th
Seventh graders investigate the area and volume of 2D and 3D figures. In this geometry lesson, 7th graders create a storyboard explaining their knowledge of 2D and 3D shapes. They analyze their data and interpret their...
Lesson Plan
Curated OER

Math: A Geometric Neighborhood

For Teachers 6th - 8th
Students, as a final project, draw a picture of their ideal neighborhood on a sunny day. In addition to the sun, their drawings include homes, trees, streets, and selected objects. Each object in their drawing has a written description...
Lesson Plan
Curated OER

Parachutes: Is it Surface Area or Shape?

For Teachers 6th - 7th
Learners investigate how to make a good parachute. For this physics lesson, students observe the motion of parachutes as it falls and measure the time. They collect data and calculate the average descent time for each canopy shape.
Lesson Plan
Curated OER

Robot Turning Lab

For Teachers 11th - 12th
Students design a robot that can turn 90 degrees. In this robotics lesson, students explain the applications of their invention. They present their design in class.
Handout
Math Open Reference

Math Open Reference: Radius of a Circle

For Students 9th - 10th Standards
Learn about the radius of a circle with this useful reference guide. Provides a detailed definition, examples, and an interactive activity that enhances further explanation. Includes links to related topics.
Unit Plan
CK-12 Foundation

Ck 12: Geometry: Diameter or Radius of a Circle Given Circumference

For Students 6th - 8th
[Free Registration/Login may be required to access all resource tools.] In this lesson, students find the radius, diameter, and circumference of different circles. Students examine guided notes, review guided practice, watch...
Unit Plan
CK-12 Foundation

Ck 12: Geometry: Diameter or Radius of a Circle Given Circumference

For Students 6th - 8th
[Free Registration/Login may be required to access all resource tools.] In this lesson students find the diameter or radius of a circle given the circumference. Students examine guided notes, review guided practice, watch instructional...
Unit Plan
CK-12 Foundation

Ck 12: Geometry: Diameter or Radius of a Circle Given Circumference

For Students 6th - 8th
[Free Registration/Login may be required to access all resource tools.] In this lesson students find the diameter or radius of a circle given its circumference. Students examine guided notes, review guided practice, watch instructional...
Activity
Purple Math

Purplemath: Completing the Square: Circle Equations

For Students 9th - 10th Standards
This tutorial works through two examples step by step that shows how to complete the square for finding the center and radius of a circle.
Activity
Varsity Tutors

Varsity Tutors: Hotmath: Practice Problems: Circles

For Students 9th - 10th
Twenty-three problems present a variety of practice working with various aspects of circles. They are given with each step to the solution cleverly revealed one at a time. You can work each step of the problem then click the "View...
Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: G C, G Co Tangent Lines and the Radius of a Circle

For Teachers 9th - 10th Standards
In this task, students are shown a circle with center O and point P on the circle. L is a line that is a tangent to the circle at P. They must show that line OP is perpendicular to line L. Aligns with G-C.A.2, G-CO.A, and G-CO.C.9.
Unknown Type
Khan Academy

Khan Academy: Circle of Confusion Diagram

For Students 9th - 10th
Understand the diagram we have created to calculate the radius of a circle of confusion.
Handout
Cuemath

Cuemath: Radius

For Students 9th - 10th Standards
This reference tool explores the radius of a circle. Provides definitions, solved examples, and practice questions with answers.
Interactive
PBS

Pbs Learning Media: Square Wheeled Tricycle: Radius and Circumference

For Students 6th - 8th
This interactive exercise focuses on working with the radius of various circles to find the circumference and area as well as challenging you to find the distance a square wheel travels around the track.
Unknown Type
Khan Academy

Khan Academy: Graph a Circle From Its Features

For Students 9th - 10th
Given information about the center and radius of a circle, graph it. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Unknown Type
Khan Academy

Khan Academy: Graph a Circle From Its Features

For Students 9th - 10th
Given information about the center and radius of a circle, graph it.
Unit Plan
Cuemath

Cuemath: Circles

For Students 3rd - 8th Standards
Explore everything about circles. Learn various parts of a circle like a diameter, radius, circumference, circles chord, tangent circles, major arc, segment, sector, and discover other interesting aspects of it. Try your hand at solving...
Website
PBS

Pbs Learning Media: Finding the Circle's Center

For Students 3rd - 5th
In this video segment [3:10] from Cyberchase, the CyberSquad must find the exact center of a circle in order to save Motherboard.
eBook
AAA Math

Aaa Math: Circumference of a Circle

For Students 9th - 10th Standards
Calculating the circumference or perimeter of a circle has gotten easier with this formula and practice for finding the circumference.
Handout
Cuemath

Cuemath: Area of a Circle

For Students 9th - 10th Standards
This mini-lesson explores the area of a circle. Provides a definition, examples, and practice questions with answers.
Unit Plan
Cuemath

Cuemath: Circumference of a Circle

For Students 6th - 8th Standards
Understand the concept of circumference by learning the definition, circumference geometry definition, circumference equation, and circumference of a circle formula. Check-out the interactive simulation for better understanding and try...
Activity
Texas Instruments

Texas Instruments: Equations of Circles

For Teachers 9th - 10th Standards
In this activity, students will explore the relationship among the location of the center of the circle, the radius of a circle, and the equation of a circle in a plane. They will also investigate the relationship between the points...

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