Refine Your Results

Now... gain access to over 2 Million curated educational videos and 500,000 educator reviews to free & open educational resources

Get a 10 Day Free Trial

204 resources with the keyterm circles

Videos (Over 2 Million Educational Videos Available)
Cells - Overview & Introduction Video
4:07
Cells - Overview & Introduction
Three-Dimensional Coordinates and the Right-Hand Rule Video
6:09
Three-Dimensional Coordinates and the...
The Secret World of Animal Sleep 101 Sleepless on the Savanna Video
3:42
The Secret World of Animal Sleep 101...
Other Resource Types (204)
+
Lesson Plan
Lesson Planet: Curated OER

SuperShapes, Part 1; "Tri"ing Triangles

For Teachers 5th - 6th
An outstanding lesson on triangles awaits your math scholars. Learners focus on the triangle, which is the strongest of all polygons. They see the role that triangles play in the design of buildings, and learn about triangle...
+
Worksheet
Lesson Planet: Curated OER

Practice: Measuring Angles and Using a Protractor and More!

For Students 4th - 6th Standards
Four fabulous worksheets are included in this resource, all having to do with the measurement of angles. On the first, anglers will use a protractor to determine the degrees of 10 different angles. An arc is drawn on each. On the second,...
+
Lesson Plan
Lesson Planet: Curated OER

Super Shapes Part 2 - Circles

For Teachers 5th - 6th
Through the use of Internet, video, and hands-on activities, youngsters learn the parts and characteristics of a circle. This fantastic activity has some excellent website activities included in the plan. Your kids will have a much...
+
Lesson Plan
Lesson Planet: Curated OER

The Circle's Measure

For Teachers 6th
Listen to the story "Sir Cumference and the Dragon of Pi" and solve the riddle and to save Sir Cumference from the knights.  Your students will love mixing an activity with story and will practice their measuring skills while completing...
+
Instructional Video1:59
Lesson Planet: Curated OER

Circumference of Circles

For Teachers 5th - 8th
In this comprehensive video Duane demonstrates how to use a formula to determine the circumference of a circle. This clip is good because it shows how to determine circumference when the diameter is knows and when only the radius is known.
+
Instructional Video4:47
Lesson Planet: Curated OER

Common Angle Measures

For Teachers 7th - 9th
Using a circle with clock like hands, the tutor explains common angle measurements. She shows that a full circular rotation equals 360 degrees, a quarter rotation equals 90 degrees, a three-quarters rotation equals 270 degrees, and a...
+
Lesson Plan
Lesson Planet: Curated OER

Drawing a Line Tangent to a Circle

For Teachers 9th - 12th Standards
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...
+
Lesson Plan
Lesson Planet: Curated OER

Shot Put Arc

For Teachers 6th - 8th
Middle schoolers 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...
+
Worksheet
Lesson Planet: Curated OER

MAP Practice

For Students 9th - 11th
In this geometry worksheet, students create circle, line and bar graphs using different comparisons of events. There are 24 questions with an answer key.
+
Lesson Plan
Lesson Planet: Curated OER

Review Graphing Parabolas & Circles

For Teachers 8th - 12th
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.
+
Lesson Plan
Lesson Planet: Curated OER

Geometric Shapes

For Teachers 1st - 3rd
Connect geometric shapes to your learners' lives with this worksheet. In order to complete this worksheet, young scholars must discover examples of triangles, squares, and circles at school, at home, and outdoors and list them on a...
+
Instructional Video2:28
Lesson Planet: Curated OER

Area of Circles

For Teachers 5th - 8th
Using a basic formula one can find the area of a circle. Duane walks learners through the steps needed to determine the missing variable, plug in the known variable, and solve to find the area of a circle. He provides two different...
+
Instructional Video3:07
Lesson Planet: Curated OER

Tangents and Circles - Geometry Help

For Teachers 9th - 12th
Does watching a person do a math problem help you understand a mathematical concept? If it does then this clip will be a great help. The tutor in this clip completes a geometry problem involving tangents, circles, and the Pythagorean...
+
Lesson Plan
Lesson Planet: Curated OER

Exploring Circles

For Teachers 9th - 12th
High schoolers explore circles using a graphing calculator. In this circles lesson, students write the equation of a circle with a given center and radius length. High schoolers find the most appropriate model for each combination of...
+
Lesson Plan
Lesson Planet: Curated OER

Deriving the Formula For the Area of a Circle

For Teachers 6th - 12th
Students derive the formula for the area of a circle. They form a rectangle by partitioning a circle using construction paper and scissors.
+
Worksheet
Lesson Planet: Curated OER

Making an Angle Eater

For Students 3rd
Third graders create angle eaters where they use circles with cut outs to identify right, obtuse, and acute angles. Students complete 1 angle eater.
+
Lesson Plan
Lesson Planet: Curated OER

Folding Circles

For Teachers 7th - 12th Standards
Students investigate properties of circles. In this geometry lesson, students differentiate between similarity and congruence as they observe polygons. They investigate properties of two and three dimensional shape.
+
Lesson Plan
Lesson Planet: Curated OER

Patterns, Patterns, Patterns

For Teachers 3rd - 6th
Create geometric art in your classroom. Learners use a ruler to mark lines on their paper, they then trace a lid to create a series of circles. They color in each circle using two tones or colors to create an interesting visual pattern. 
+
Worksheet
Lesson Planet: Curated OER

Attributes of Shapes Guided Lesson Explanation

For Students 1st
Triangles, circles, and rectangles are featured in a colorful, one-page worksheet that defines and illustrates these shapes. Read the explanations with your first graders and have them count the number of shapes in a given box. Since the...
+
Lesson Plan
Lesson Planet: Curated OER

Finding Areas of Polygons and Circles

For Teachers 6th - 8th
For this math worksheet, students find the areas for the shapes. They apply the appropriate formula for each shape that is drawn and in the word problems.
+
Worksheet
Lesson Planet: Curated OER

Calculate Area Using Pi

For Students 7th - 9th
Geometers find the area of four circles given their circumferences. Circumference is presented in the form of "numeral (diameter) x pi"; the answer key shows solutions as  "numeral (radius squared) x pi," so computation is limited to...
+
Lesson Plan
Lesson Planet: Curated OER

Small Angle Calculations

For Teachers 4th - 7th
Students work with circles, angles and estimating angles in the night sky. In this circles and angles instructional activity, students practice measuring a degree using the circumference of a circle and apply the degree to determine a...
+
Lesson Plan
Lesson Planet: Curated OER

Properties of Circles

For Teachers 3rd - 5th
Students study the properties of circles. In this circles lesson, students read a word problem about circles. Students watch a video about the activity and then practice drawing the circle solution to the problem. Students watch another...
+
Worksheet
Lesson Planet: Curated OER

Shapes Worksheet: Tracing Circles

For Students Pre-K - 1st
Early learners practice tracing 7 different sized circles and then draw 5 circles on their own in the space provided. A good, basic activity for working on fine motor skills.