CK-12 Foundation
Ck 12: Trigonometry: Length of an Arc
[Free Registration/Login may be required to access all resource tools.] Definition and measurement of an arc on a circle,
Khan Academy
Khan Academy: Name Shapes 1
Practice identifying circles, triangles, squares, and rectangles. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
CK-12 Foundation
Ck 12: Geometry: Inscribed Angles in Circles
[Free Registration/Login may be required to access all resource tools.] Apply inscribed angle theorems.
CK-12 Foundation
Ck 12: Geometry: Parts of Circles
[Free Registration/Login may be required to access all resource tools.] Name the parts of a circle.
CK-12 Foundation
Ck 12: Elem Math: Counting the Number of Basic 2 D Shapes in a Set of Figures
[Free Registration/Login may be required to access all resource tools.] Students watch a video and attempt practice problems on identifying various 2D shapes in a set of figures.
Paul Dawkins
Paul's Online Notes: Algebra: Common Graphs
Students investigate how to graph a wide variety of equations and functions. Topics explored are lines, rational functions, parabolas, ellipses, and transformations. Class notes, definitions, and examples with detailed solutions are...
Discovery Education
Discovery Education: Web Math: Find Out Things About Circles
This WebMath site will assist with finding the radius, diameter, circumference, and area of a circle.
Khan Academy
Khan Academy: Arc Measure
Use the fact that the arc measures of a circle must sum to 360 degrees to find missing arc measures. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Khan Academy
Khan Academy: Graph a Circle From Its Features
Given information about the center and radius of a circle, graph it. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Varsity Tutors
Varsity Tutors: Hotmath: Graphing Calculator Practice Problems: Circles
Practice using your graphing calculator for drawing circles and for finding measurements for circles and parts of the circle. If you get stumped or if you would like to check your work, then select the View Solution button, which is...
CK-12 Foundation
Ck 12: Geometry: Angles Outside a Circle Intermediate
[Free Registration/Login may be required to access all resource tools.] This concept teaches students how to calculate angles formed outside a circle by tangent and secant lines.
CK-12 Foundation
Ck 12: Geometry: Arcs in Circles
[Free Registration/Login may be required to access all resource tools.] This concept teaches students properties of arcs and central angles in circles. Students examine guided notes, review guided practice, watch instructional videos and...
CK-12 Foundation
Ck 12: Geometry: Inscribed Angles in Circles
[Free Registration/Login may be required to access all resource tools.] This concept teaches students properties of inscribed angles and how to apply them.
CK-12 Foundation
Ck 12: Geometry: Inscribed Quadrilaterals in Circles
[Free Registration/Login may be required to access all resource tools.] This concept teaches students properties of inscribed quadrilaterals in circles.
CK-12 Foundation
Ck 12: Geometry: Parts of Circles
[Free Registration/Login may be required to access all resource tools.] This concept teaches students the vocabulary for the parts of circles, including lines passing through circles.
CK-12 Foundation
Ck 12: Geometry: Pi
[Free Registration/Login may be required to access all resource tools.] Identify pi as the ratio of a circle's diameter to a circle's circumference.
CK-12 Foundation
Ck 12: Geometry: Segments From Secants and Tangents
[Free Registration/Login may be required to access all resource tools.] This concept teaches students to solve for missing segments created by a tangent line and a secant line intersecting outside a circle.
CK-12 Foundation
Ck 12: Parts of Circles
[Free Registration/Login Required] Students will explore how the length of a chord in a circle changes by moving the points of the chord. Click learn more to watch a video and click challenge me to answer a practice question.
CK-12 Foundation
Ck 12: Arcs in Circles
[Free Registration/Login Required] Students will explore arcs in circles with this interactive activity. Click learn more to watch a video and click challenge me to answer a practice question.
CK-12 Foundation
Ck 12: Arcs in Circles
[Free Registration/Login Required] Students use the interactive circle to change the measure of the arcs. Click learn more to watch a video and click challenge me to answer a practice question.
CK-12 Foundation
Ck 12: Inscribed Angles in Circles
[Free Registration/Login Required] Students will explore how angles are inscribed in circles with this interactive activity. Click learn more to watch a video and click challenge me to answer a practice question.
CK-12 Foundation
Ck 12: Angles on and Inside a Circle
[Free Registration/Login Required] Students can explore the angles on and inside a circle with this interactive activity. Click learn more to watch a video and click challenge me to answer a practice question.
CK-12 Foundation
Ck 12: Angles Outside a Circle
[Free Registration/Login Required] Students will move the points on the line segments to explore anlge measures outside the circle. Click learn more to watch a video and click challenge me to answer a practice question.
CK-12 Foundation
Ck 12: Segments From Secants
[Free Registration/Login Required] Students will adjust the points to explore the secants of a circle. Click learn more to watch a video and click challenge me to answer a practice question.