Lesson Plan
Curated OER

Arc Length and Sectors

For Teachers 9th - 12th Standards
Find the length of an arc. High schoolers relate central angles to the area and length of a sector and graph circles on the TI to make predictions.
Lesson Plan
Texas Instraments

Angles in Circles

For Teachers 9th - 12th Standards
Teach your learners how to investigate the relationship between a central angle and an inscribed angle which subtend the same arc of a circle. The dynamic nature of Cabri Jr. provides opportunity for conjecture and verification.
Worksheet
Curated OER

Inscribed and Central Angles in a Circle

For Students 8th - 10th
In this geometry worksheet, students find the missing angle that is inscribed inside of a circle. They define vocabularies related to the circle. There are 17 questions.
Lesson Plan
Curated OER

Gateway Arc Length

For Teachers 9th - 12th Standards
Learners differentiate and calculate the length of an arc. They define an arc and relate it to the area of a circle and integrate the function to solve the equations. Students use their TI calculators to graph the equation.
Interactive
Curated OER

Word Problems that involve Circles

For Students 10th
In this geometry worksheet, 10th graders solve application word problems based on knowledge of a circle. The one page interactive worksheet contains four questions. Answers and hints are included. 
Lesson Plan
Curated OER

Circular Motion: Target Practice

For Teachers 5th - 12th
Students demonstrate direction of velocity of an object in circular motion. They discuss the mathematical formula, and demonstrate the formula using a string, rubber stopper and a target.
Lesson Plan
Curated OER

Circles and Angles

For Teachers 9th - 11th
Students identify tangents, chords and secants. In this geometry lesson, students graph circles and identify angles created by secant lines, tangent lines and chords.
Lesson Plan
Curated OER

Star Circles

For Teachers 9th - 11th
In this star circles worksheet, students solve six problems given a diagram of a time-exposure photograph of the stars. Students determine the scale of the image, the location of the North Celestial Pole, they identify Polaris and they...
Lesson Plan
Curated OER

Arc Length - Horse

For Teachers 9th - 12th
Students define an arc and calculate its length. In this geometry lesson, students find examples of arc in the real world. They show their understanding of arcs through problem solving.
Lesson Plan
Alabama Learning Exchange

Radians: Just Another Way

For Teachers 9th - 12th Standards
Serve up angle measurements on paper plates. Pupils use paper plates and paper-folding techniques to create a unit circle with conversions for special angles. Using their plates, learners explore the relationship between angle...
Assessment
1
1
Balanced Assessment

Oops! Glass Top

For Students 9th - 12th Standards
 A short assessment asks participants to find the original radius required to replace a table top. The problem provides a hypothetical situation of having a segment of a broken glass table top. Pupils find the radius of the...
Worksheet
Curated OER

Arcs in Circles

For Students 10th
For this arcs in circles worksheet, 10th graders identify 10 different circles and the measurement of their arcs. First, they determine the length of a minor arc to the nearest integer. Then, students determine the radius of a circle...
Worksheet
Curated OER

Angles and Arcs

For Students 10th
In this angles and arcs instructional activity, 10th graders solve 8 different problems that relate to determining the measure of various angles and arcs of a circle. First, they define a central angle and the difference between a major...
Worksheet
Curated OER

Arcs and Chords

For Students 10th
In this arcs and chords worksheet, 10th graders solve 6 different problems related to determining the arcs and chords of various circles. First, they define the 3 theorems that state the relationships between arcs, chords, and diameters....
Worksheet
Curated OER

Solve for the Arc Length Problems

For Students 11th - Higher Ed
In this arc length instructional activity, students solve for the arc length for four angles.  Three of the angles are given in degrees while the other angle length is given in radians.  The solutions are not provided.
Worksheet
Curated OER

Arcs and Chords

For Students 10th
In this arcs and chords worksheet, 10th graders solve 7 different types of problems related to identifying arcs and chords in a circle. First, they find the measure of each arc to the nearest tenth, if O is the center point. Then,...
Worksheet
Curated OER

Angles and Arcs

For Students 10th
For this angles and arcs worksheet, 10th graders solve 18 various types of problems related to determine various angles and arcs of a circle. First, they find the measure of each angle and arc of the first circle shown. Then, students...
Lesson Plan
Curated OER

Geometry of Circles: Week 7

For Teachers 10th - Higher Ed
In this circle worksheet, students determine the number of degrees in a minor arc, find the area of a circle, find the area of a shaded region. This two-page worksheet contains six problems.
Lesson Plan
Curated OER

Geometry of Circles - Week 7 (Area & Circumference)

For Teachers 12th - Higher Ed
In this circle worksheet, learners solve problems involving the circumference, area and arc length in a circle. They explore the union of circles and semicircles, as well as the line segments tangent to the circle. This two-page...
Lesson Plan
Curated OER

Length of an Arc

For Teachers 11th - 12th
Students compute the length of an arc and each hypotenuse in the give figure, adding them up in the end. They then develop the formula for the arc length with respect to the x-axis and the y-axis. Students also develop a formula for the...
Worksheet
Curated OER

Arcs and Chords

For Students 9th - 10th
For this circles worksheet, students find missing arc lengths and chords.  Students also find the length of radii in three problems.
Worksheet
Curated OER

Arcs and Chords Homework

For Students 9th - 12th
In this geometry worksheet, high schoolers examine a circle with chords and apply formulas to solve for the missing segments or arc. There are 9 questions.
Worksheet
Curated OER

Quiz: Angles and Arcs in Circles - Central and Inscribed

For Students 10th - 12th
In this angles and arcs in circles worksheet, students determine the angle and arc measurement in a circle from given information. This one-page worksheet contains ten problems.
Worksheet
Curated OER

Geometry Circles

For Students 9th - 11th
In this circle worksheet, students find the measure of identified angles. Students are given the measurement of arcs and of the central angle in a circle. This two-page worksheet contains 45 problems. Answers are provided on page two...

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