Worksheet
Curated OER

Circles Terminology Multiple Choice

For Students 9th - 12th
In this circles learning exercise, students solve 10 multiple choice problems. Students answer questions about diameter and chord relationships, tangent lines to a circle, circumference, the Pi relationship, etc.
Lesson Plan
Curated OER

Circumferences, Diameters, and Radii

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

The Area of a Circle

For Teachers 8th
Eighth graders find the circumference and diameter of several lids, show the relationship of the two measurements and derive the formula for finding the area of a circle. For this area of a circle lesson plan, 8th graders find...
Lesson Plan
Curated OER

Angles, Triangles, Quadrilaterals, Circles and Related

For Teachers 6th - 8th
Students classify angles. For this angles lesson, students explore the characteristics of angles, triangles, quadrilaterals and circles. They identify polygons and sing a classifying angles song. Students participate in a manipulative...
Lesson Plan
Mathematics Assessment Project

Sorting Equations of Circles 2

For Teachers 9th - 12th Standards
How much can you tell about a circle from its equation? This detailed lesson plan focuses on connecting equations and graphs of circles. Learners use equations to identify x- and y-intercepts, centers, and radii of circles. They also...
Worksheet
Curated OER

Skills Practice: Area of Circles

For Students 7th - 8th
Two practice pages with 10 problems each show circles and give their radii. Learners calculate the area. Answers are provided. 
PPT
Curated OER

Circles

For Teachers 3rd - 4th
A very basic presentation on the vocabulary associated with circles has come around. Math whizzes see definitions and examples of the radius, diameter, chord, and central angle of a circle. The last slide says "practice time," but there...
Lesson Plan
Curated OER

Consistent Circles

For Teachers 8th - 12th
Students create a design of a circle. In this geometry lesson, 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.
Worksheet
Curated OER

Circumference and Area of Circles

For Students 4th - 6th
In this circles worksheet, students use given radius or diameter measurements and find the circumference and area of circles to one decimal place.
Worksheet
Curated OER

Circles

For Students 10th
In this circles worksheet, 10th graders solve and complete 16 various types of problems. First, they state the center and radius for the given equation and graph. Then, students determine if each point is on the circle, in its interior,...
Worksheet
Curated OER

Area Of Circles

For Students 4th - 8th
For this math worksheet, students complete 12 problems where they find the radius and the area of circles. Examples are given in this well-designed worksheet.
Worksheet
Math Mammoth

Circles

For Students 6th - 8th Standards
Your class examines a series of shapes and discusses how we know that they are not circles. In this way, you begin to acquaint them with the properties and parts of this geometric figure. Then, teach them how to use a protractor to...
Lesson Plan
1
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Illustrative Mathematics

Right Triangles Inscribed in Circles II

For Teachers 9th - 10th Standards
So many times the characteristics of triangles are presented as a vocabulary-type of lesson, but in this activity they are key to unraveling a proof. A unique attack on proving that an inscribed angle that subtends a diameter must be a...
Assessment
Concord Consortium

Outward Bound

For Students 9th - 12th Standards
Just how far can I see? The short assessment question uses the Pythagorean Theorem to find the distance to the horizon from a given altitude. Scholars use the relationship of a tangent segment and the radius of a circle to find the...
Worksheet
Curated OER

Area Of Circles

For Students 5th - 8th
In this math worksheet, students complete 23 problems where they find the area of circles when the radius, diameter, or circumference is given. Examples are given in this well-designed worksheet.
Activity
Mrs. Burke's Math Page

The Amazing Pi Race

For Teachers 7th - 12th Standards
Add a sense of excitement to your math class with this race across the country. Using their knowledge of all things circular, young mathematicians work in pairs answering a series of pi-related word problems as they hop from one city to...
Worksheet
Curated OER

Circumference and Area of Circles

For Students 5th - 6th
In this circumference and area worksheet, students find each for a set of 12 given circles; either diameter or radius are given. A website reference for additional resources and answers are provided.
Lesson Plan
Curated OER

Equations for Curves Passing through a Given Set of Points

For Teachers 9th - 12th Standards
Learner use three random locations on the coordinate system and simplify the expression and assign result to the variable loc. They substitute guesses for the center and radius of the circle in the equation for the center of a circle and...
Worksheet
Curated OER

Arcs and Sectors

For Students 10th
In this arcs and sectors worksheet, 10th graders solve and complete 2 different types of problems. First, they find the radius of a circle with a given circumference. Then, students find the perimeter of the given sector and the area of...
Worksheet
Curated OER

Making a Six-pointed Star

For Students 7th - 8th
In this polygon worksheet, students identify and create a six-pointed star by completing 6 steps. First, they use a compass to trace a circle with a given radius. Then, students draw a point on circumference of the circle and place the...
Lesson Plan
Curated OER

Looking at Circumference

For Teachers 6th - 8th
Young scholars understand where the number for pi comes from. They understand and use the formula for circumference. Students measure the circles given out and the diameters of those circles and record the results on their worksheet.
Lesson Plan
Curated OER

Shot Put Arc

For Teachers 6th - 8th
Students complete Part A: Dissecting a Circle. They generate their own chords within the circle. Students measure the various parts of the arc in the shot put pit. The first two measurements, the chord and distance from the midpoint of...
Lesson Plan
Curated OER

Finding Areas of Polygons and Circles

For Teachers 6th - 8th
In this math worksheet, middle schoolers find the areas for the shapes. They apply the appropriate formula for each shape that is drawn and in the word problems.
Lesson Plan
Curated OER

Equation of a Circle

For Teachers 9th - 12th Standards
Students write the equation of a circle. In this geometry instructional activity, students check the solution of a coordinate pair by evaluating them. They graph the circle given the equation and radius.

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