Unit Plan
CK-12 Foundation

Ck 12: Geometry: Inscribed Angles in Circles

For Students 9th - 10th Standards
[Free Registration/Login may be required to access all resource tools.] This concept teaches students properties of inscribed angles and how to apply them.
Activity
Annenberg Foundation

Annenberg Learner: Geometry: Circles: Inscribed Angles

For Students 4th - 8th Standards
Study inscribed angles in semicircles and quarter-circles. What conjectures can you make about the measure of an inscribed angle in semi- or quarter-circles?
Unit Plan
Texas Education Agency

Texas Gateway: Making and Verifying Conjectures About Circles

For Students 9th - 10th Standards
Given information about the relationship(s) witnin one circle or a set of circles, the student will explore special segments and angles of circles.
Interactive
Mangahigh

Mangahigh: Shape: Inscribed and Central Angles in Circles

For Students 9th - 10th Standards
Use theorems to prove ideas of inscribed and central angles in circles.
Activity
Texas Instruments

Texas Instruments: Inscribed Angles Intercepting the Same Arc

For Teachers 9th - 10th Standards
Students investigate the properties of angles inscribed in a circle. They use the drawing and measurement tools of Cabri Jr. to draw and measure certain angles, and establish the relationship between angles that intercept the same arc.
Unit Plan
CK-12 Foundation

Ck 12: Geometry: Inscribed Quadrilaterals in Circles

For Students 9th - 10th Standards
[Free Registration/Login may be required to access all resource tools.] This concept teaches students properties of inscribed quadrilaterals in circles.
Activity
Texas Instruments

Texas Instruments: Relation Between Central Angle and Inscribed Angle Measure

For Teachers 9th - 10th Standards
Students investigate the relationship between measure of central and inscribed angles in a circle.
Unknown Type
Khan Academy

Khan Academy: Tangents of Circles Problems

For Students 9th - 10th
Solve problems related to tangents of circles. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Activity
Texas Instruments

Texas Instruments: Arcs and Angles: Explore Inscribed & Central Angle Properties

For Teachers 9th - 10th Standards
This activitie uses the power of Cabri Jr. to explore the relationship between inscribed angles and central anlges in cirles.
Activity
CK-12 Foundation

Ck 12: Inscribed Quadrilaterals in Circles

For Students 9th - 10th Standards
[Free Registration/Login Required] Students will explore quadrilaterals inscribed in circles with this interactive activity. Click 'Challenge Me' to answer a practice question.
Handout
Geometry Help

Geometry Help: Arcs, Angles, and Sectors

For Students 9th - 10th Standards
Explains the basic concept of arcs, angles, and sectors with step-by-step instructions and methods for solving specific problems on your own relating to this topic.
Activity
Texas Instruments

Texas Instruments: Inscribing a Circle in a Triangle

For Teachers 9th - 10th
In this activity, students bisect the angles of a triangle and find the incenter of the triangle. They find the distance from the incenter to the side of the triangle and use it as radius. With the incenter as the center, they inscribe a...
Activity
Texas Instruments

Texas Instruments: Cabri Jr. Inscribed and Central Angles

For Teachers 9th - 10th Standards
This activity uses Cabri Jr. to explore the relationship between inscribed and central angles subtended from the same arc of a circle.
Activity
Varsity Tutors

Varsity Tutors: Hotmath: Graphing Calculator Practice Problems: Circles

For Students 9th - 10th
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...
Handout
Wolfram Research

Wolfram Math World: Inscribed Angle

For Students 9th - 10th Standards
This site provides not only a definition of inscribed angle but also links to related terms.
Unknown Type
Khan Academy

Khan Academy: Quiz: Inscribed Quadrilaterals

For Students 9th - 10th Standards
Use the fact that opposite angles in an inscribed quadrilateral are supplementary to solve a few problems. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Activity
Ministry of Education and Universities of the Region of Murcia (Spain)

Ministerio De Educacion Y Ciencia: Ingulos en Una Circumferencia

For Students 9th - 10th Standards
In Spanish. This site discusses the angles relative to the circles. It defines the concept of central angle, inscribed, interior, exterior and some important geometric outcomes and applications which uses these concepts.
Unit Plan
Mangahigh

Mangahigh: Shape: Quadrilaterals Inscribed in Circles

For Students 9th - 10th Standards
Determine the missing angle measures of quadrilaterals inscribed in circles.