Imagine Learning Classroom
Learn Zillion: Lesson Video: 'Show Angle Relationships in Cyclic Quadrilaterals'
In this lesson, you will show angle relationships in cyclic quadrilaterals by using the Central Angle Theorem. [3:27]
Khan Academy
Khan Academy: Formal Understanding of Congruence
Simple proof using RSH postulate to show that a radius perpendicular to a chord bisects it
Khan Academy
Khan Academy: Introduction to Euclidean Geometry: Language of the Circle
In this video student learn formal definition of a circle including tangent and secant lines, diameters, radii, major and minor arcs.
Khan Academy
Khan Academy: Geometry: Circle Area Chords Tangent
This video [10:06] contains touches the following topics: Pythagorean theorem, 45-45-90 triangles, 30-60-90 triangles, circumscribed polygons, area, chord length and tangents to circles.
Khan Academy
Khan Academy: Circles: Inscribed and Central Angles
Showing that an inscribed angle is half of a central angle that subtends the same arc.
Study Pug
Study Pug: Angles in a Circle
Video shows how to find an angle inscribed in a circle. [1:58]
Khan Academy
Khan Academy: Inscribed Angles
Sal finds a missing inscribed angle using the inscribed angle theorem.
Khan Academy
Khan Academy: Inscribed Shapes: Find Inscribed Angle
Using either the inscribed angle theorem or the fact that two inscribed angles that intercept the same arc must be congruent.
Khan Academy
Khan Academy: Inscribed Angle Theorem Proof
Proving that an inscribed angle is half of a central angle that subtends the same arc.