Flipped Math
Circles and Arc Lengths
Discuss all things round and round. Pupils review finding area and the circumference of circles and use them to solve problems. Next, they learn about central angles and their relationships to measures of arcs. Learners then find out how...
EngageNY
The Area of a Circle
Introduce learners to two methods to estimate the formula for the area of a circle. The first method uses a sector of a circle to form a rectangle, and the other uses grids to estimate the area. The problems in the 18th segment of a...
K12 Reader
Anatomy of a Circle
Make sure your learners are well-versed in circles with a reading passage. Pupils will pick up some important circle-related terms as they read and respond to the five included questions.
Didax
Pi Day #1a – Discovering Pi
Unravel the mystery behind the infamous number pi. Scholars complete a series of activities that explores where pi comes from, its digits and estimation strategies. Pupils should be ready to measure, calculate, and look for patterns to...
Curated OER
The Real Deal On Circles
Fifth graders investigate circles and area. In this geometry lesson, 5th graders find the area, diameter and circumference of a circle. They estimate the data and then calculate it.
Curated OER
Circumference of Circle
In this circumference activity, students find circumference. Radius and diameter are given, as well as an answer key. Workspace is provided.
Curated OER
Surface Area of Spheres
High schoolers identify the properties of a sphere. In this geometry lesson, students calculate the surface area of spheres using the formula derived by nets. They identify the radius and diameter of the sphere.
Curated OER
Area of Circle Worksheets
In this geometry worksheet, 10th graders calculate the area of circle give either the radius or the diameter. The one page interactive worksheet contains ten questions. Answers and hints are included.
Curated OER
Circles Area Perimeter and Circumference
In this circles activity, students calculate to find the area, radius, circumference and perimeter of circles. A reference web site is given for additional activities.
Curated OER
Circles
In this geometry worksheet, 10th graders determine the circumference and area of a circle given either the diameter or the radius. The one page interactive worksheet contains ten questions. Answers and hints are included.
Curated OER
Cones
In this geometry worksheet, 10th graders determine the volume of a cone, given either the diameter or radius and the height. The one page interactive worksheet contains ten questions. Answers and hints are included.
Curated OER
Surface Area of Hemisphere Worksheet B
Learners determine the surface area of a hemisphere, given the diameter or the radius. This two page worksheet contains eight multi-step problems. Answers are provided on the last page.
Curated OER
Circle Area, Perimeter and Circumference #2
In this area, perimeter and circumference worksheet, students determine radius and circumference of given circles. A reference web site is given for additional activities.
Curated OER
Finding PI
Students select and use appropriate operations, methods and tools to compute or estimate using whole numbers. They develop and use formulas for determining the circumference and area of circles. Students determine and describe the...
Curated OER
Pi
Sixth graders read the book "Sir Cumference and Knights of the Round Table" to introduce them to the concept of Pi. As a class, they discover where Pi originated and define the terms circumference, radius and diameter. To end the...
Curated OER
Consistent Circles
Students create a design of a circle. In this geometry lesson plan, students identify the measure of the diameter and radius of a circle. They graph and analyze their collected data and write equations based on direct variation.
Curated OER
Mathematics In You
Students construct ratios using the hand as data. They use examples of cortical and trabecular bone found in the long bones to measure circumference, diameter, length, and weight of long bones. They perform computations using growth...
Curated OER
Basic Circle Worksheet
In this circle worksheet, students identify center, radius and diameter of three circles. An answer key is included on page 2.
Curated OER
Noun/Adjective/Subject/Verb Agreement
Students create a wheel from construction paper to use to create sentences. The wheel consists of four concentric circles, beginning with the largest being 8 inches in diameter. Each circle represents one part of a sentence. Students...
Curated OER
Parts of the Circle
In this geometry skills worksheet, students respond to 3 questions that require them to examine the part of circles and identify them as diameters, chords, radii, or centers.
Curated OER
Parts of the Circle
In this geometry skills activity, students examine 3 labeled circles and identify the noted items as diameters, chords, radii, or centers.
Curated OER
Write the Parts of the Circle in the Place Holders
In this parts of a circle worksheet, students place the names of 6 different parts of a circle in rectangular place holders. They use labels such as cord, secant, diameter, radius, tangent, and center.
Curated OER
Sir Cumference and the Dragon Pi
Geometry adventurers study circumference of a circle as they listen to Sir Circumference and the Dragon Pi, by Cindy Neuschwander. In groups, they use string to measure the diameter and circumference of circular objects and...
Curated OER
The Derivation of (Pi)
Seventh graders groups measure the diameter and circumference of each of the circular objects in the room. They record their results on their student worksheets and access a computer spreadsheet program to compile their results.
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