292 Videos for "circles"

Cyclic Quadrilaterals and Parallel Lines in Circles  Concept
Math › Geometry › Circles
How to prove that opposite angles in a cyclic quadrilateral are congruent; how to prove that parallel lines create congruent arcs in a circle. 
The Circle  Problem 9
Math › Precalculus › Conic Sections
How to write the equation for a circle from the center and one point on the circle. 
The Circle  Problem 9
Math › Algebra 2 › Conic Sections
How to write the equation for a circle from the center and one point on the circle. 
Equation of a Circle  Concept
Math › Trigonometry › Pythagorean Theorem
How to derive the equation for a circle using the distance formula. 
Parametrizing a Circle  Problem 3
Math › Precalculus › Vectors and Parametric Equations
How to write the parametric equations of a circle or semicircle centered at (0,0) with radius r, oriented clockwise. 
Cyclic Quadrilaterals and Parallel Lines in Circles  Problem 1
Math › Geometry › Circles
How to calculate angles in a cyclic quadrilateral given arc measures and two angle measures. 
Cyclic Quadrilaterals and Parallel Lines in Circles  Problem 2
Math › Geometry › Circles
How to calculate the measure of an arc created by a cyclic parallelogram. 
Calculating Coordinates in the Unit Circle  Concept
Math › Trigonometry › Pythagorean Theorem
How to describe the unit circle. How to draw the unit circle and label its parts. How to strategize about finding coordinates on the unit circle. 
Area of Circles  Problem 1
Math › Geometry › Area
How to calculate the area of a circle if a diameter is given. 
Calculating Coordinates in the Unit Circle  Concept
Math › Geometry › Pythagorean Theorem
How to describe the unit circle. How to draw the unit circle and label its parts. How to strategize about finding coordinates on the unit circle. 
Area of Circles  Problem 2
Math › Geometry › Area
How to find the circumference of a circle if the area is given. 
Equation of a Circle  Concept
Math › Geometry › Pythagorean Theorem
How to derive the equation for a circle using the distance formula. 
Equation of a Circle  Problem 2
Math › Geometry › Pythagorean Theorem
How to identify the center and radius of a circle given an equation. 
Equation of a Circle  Problem 2
Math › Trigonometry › Pythagorean Theorem
How to identify the center and radius of a circle given an equation. 
The Circle  Problem 8
Math › Algebra 2 › Conic Sections
How to write the equation for a circle from a graph. 
Circumscribed and Inscribed Circles and Polygons  Concept
Math › Geometry › Constructions
How to define circumscribed and inscribed circles and polygons relative to each other. 
The Circle  Problem 8
Math › Precalculus › Conic Sections
How to write the equation for a circle from a graph. 
The Circle  Problem 7
Math › Precalculus › Conic Sections
How to write the equation for a circle from the endpoints of the diameter. 
Regions Between Circles and Squares  Concept
Math › Geometry › Area
How to calculate the area between a square and an inscribed circle. 
The Circle  Problem 6
Math › Precalculus › Conic Sections
How to write the equation of a circle from a given radius and center.