Curated OER
Calculate the Radius
For 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.
Yummy Math
Penny Wars
As the saying goes, a penny saved is a penny earned. Young scholars use a penny activity to earn their way to an understanding of volume. Given three different-sized cylindrical containers, individuals make calculations to determine the...
Curated OER
Discovering Pi/Welcome to Pi Day
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...
Curated OER
Find Radius of the Circles
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.
Curated OER
Geometry: Calculating the Area of a Circle
In this area worksheet, students use the perimeter or radius to determine the area of a circle. This one-page worksheet contains 8 problems. This worksheet may be produced in printed form. Answers may be viewed on-line.
Curated OER
Circles-Diameter, Circumference, Radius and the Discovery of Pi
Seventh graders measure the diameter, circumference and radius of a circle and find pi using the diameter and circumference. For this geometry lesson, 7th graders work in groups to find the diameter, radius, and circumference of circles....
Curated OER
Volume Calculation Exercise
Middle schoolers work with scientific notation and rounding as they determine volume. In this volume lesson, pupils attempt to calculate the volume of the planet Jupiter. They use rounding to two significant digits and scientific...
National Math + Science Initative
Using Linear Equations to Define Geometric Solids
Making the transition from two-dimensional shapes to three-dimensional solids can be difficult for many geometry high schoolers. This comprehensive Common Core lesson plan starts with writing and graphing linear equations to define a...
Curated OER
Review Graphing Parabolas & Circles
Students review how to graph parabolas. They practice graphing two different parabolas using the vertex and table method. They solve problems related to graphing circles, determining the radius and the center.
Curated OER
Puck's Girdle
Fifth graders calculate the perimeters, areas, and volumes of everyday objects. They discuss the word problem involving Puck from the Shakespeare play "Mid-Summer Night's Dream," and invent and plan a method for solving the problem in...
National Research Center for Career and Technical Education
Transportation, Distribution, and Logistics: Tire and Wheel Assemblies
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...
Texas Instruments
Drawing a Line Tangent to a Circle
Explore lines tangent to a circle. In this math lesson, students manipulate circles and lines on a TI calculator. They draw a circle and analyze perpendicular lines intersecting the circle in only one place. This activity works best if...
Curated OER
Small Angle Calculations
Young scholars work with circles, angles and estimating angles in the night sky. In this circles and angles lesson, students practice measuring a degree using the circumference of a circle and apply the degree to determine a way to use...
Mathematics Assessment Project
Calculating Arcs and Areas of Sectors of Circles
Going around in circles trying to find a resource on sectors of circles? Here is an activity where pupils first complete an assessment task to determine the areas and perimeters of sectors of circles. They then participate in an activity...
Curated OER
Calculate the Radius
In this radius instructional activity, students calculate the radius of a circle when the area is given to them. Students complete 5 problems total.
101 Questions
Pokémon Go Cheat
Gotta catch them all—no learner left behind! Young scholars must predict the length of time it takes a phone attached to a fan to travel five kilometers given the radius and rotations versus time data. Why would you attach a phone to a...
Illustrative Mathematics
Doctor's Appointment
Geometric volume calculations are brought into the real world in a quick set of application problems. Learners are asked to help a patient figure out how to drink a prescribed amount of water both at work and at home. This activity...
Curated OER
Calculate Radius and Diameter, Estimate Circumference #2
In this radius, diameter and circumference learning exercise, students calculate diameter and estimate circumference of 2 given circles. A reference web site is given for additional activities.
Curated OER
Circle Problems - Radius, Diameter, Circumference and Area
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....
Curated OER
Find the Radius of the Smallest Circle that Contains the Figure
For this geometry worksheet, students calculate the radius of the smallest possible circle that contains the figure provided. The complete solution is provided by clicking on the "show solution" button found below the problem.
Curated OER
Radius, Diameter and Area
Students identify the radius and diameter of a circle. In this geometry lesson, students calculate the volume and area of a cylinder and circle. They relate the circumference of a circle to Pi.
Curated OER
Exploring Circles
Students explore circles using a graphing calculator. In this circles lesson plan, students write the equation of a circle with a given center and radius length. Students find the most appropriate model for each combination of data they...
Illustrative Mathematics
Solar Eclipse
Learners take on the role of astronomers, calculating conditions necessary for a total solar eclipse. Concepts of similar triangles and properties of circles come together as pupils create ratios and use real measurements in determining...
Illustrative Mathematics
The Lighthouse Problem
Long considered the symbol of safe harbor and steadfast waiting, the lighthouse gets a mathematical treatment. The straightforward question of distance to the horizon is carefully presented, followed by a look into the different...