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Brian McLogan
Given a point outside a circle and a tangent line determine the length from the point to center
Learn how to solve problems with tangent line. A tangent line to a circle is a line that touches the circle at exactly one point. The tangent line to a circle makes a right angle with the radius of the circle at the point of its...
Brian McLogan
What is the formula to determine the length of an arc
Learn how to solve problems with arcs of a circle. An arc is a curve made by two points on the circumference of a circle. The measure of an arc corresponds to the central angle made by the two radii from the center of the circle to the...
Brian McLogan
How to determine the value of x using the definition of a tangent line to a circle
Learn how to solve problems with tangent line. A tangent line to a circle is a line that touches the circle at exactly one point. The tangent line to a circle makes a right angle with the radius of the circle at the point of its...
Weatherthings
Weather Things: Aurora and Unique Phenomena
A blue sky and fluffy bright clouds are things that are seen around the world. The atmosphere presents a multitude of sights and phenomena using light, air, water droplets, ice crystals, and dust. Many of the phenomena give clues to...
msvgo
Viruses and Viroids
This nugget describes the characteristic features of viruses, viroids and prions. It explains the contributions of different scientist and also provides examples of various types of viruses.
Weatherthings
Weather Things: Physics of Optics
A blue sky and fluffy bright clouds are things that are seen around the world. The atmosphere presents a multitude of sights and phenomena using light, air, water droplets, ice crystals, and dust. Many of the phenomena give clues to...
Khan Academy
SAT Prep: Test 8 Section 8 Part 2
One of Sal's greatest gifts to students in this SAT video series has been his demonstration of word problems. Because he writes out equations while simultaneously reading the information provided, he often arrives at the correct answer...
Khan Academy
Khan Academy: Trigonometry: Radians: Example: Radian Measure and Arc Length
This video shows an example that thinks about the relationship between an arc length and the angle that is subtended by the arc. [3:29]
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.
Loyola University Chicago
Math Flix: Circle Vocabulary
This QuickTime movie provides an opportunity to learn about the vocabulary of a circle. As you watch and listen to the teacher and student interact it helps clarify the thinking behind applying this concept.
Khan Academy
Khan Academy: Circle Theorems Basic Example
The video lesson from Khan Academy provides practice questions for the SAT. Watch Sal work through a basic Circle theorems problem.