292 Videos for "circles"

Calculating Coordinates in the Unit Circle  Problem 1
Math › Geometry › Pythagorean Theorem
How to find the coordinates on the unit circle, given an angle of 225 degrees. 
Calculating Coordinates in the Unit Circle  Problem 1
Math › Trigonometry › Pythagorean Theorem
How to find the coordinates on the unit circle, given an angle of 225 degrees. 
Similar Triangles in Circles and Right Triangles  Problem 2
Math › Geometry › Similarity
How to find missing side lengths in a right triangle with an altitude drawn from the right angle. 
Calculating Coordinates in the Unit Circle  Problem 2
Math › Geometry › Pythagorean Theorem
How to find the coordinates on the unit circle, given an angle of 60 degrees. 
Calculating Coordinates in the Unit Circle  Problem 2
Math › Trigonometry › Pythagorean Theorem
How to find the coordinates on the unit circle, given an angle of 60 degrees. 
Arc Length  Problem 2
Math › Geometry › Circles
How to find the radius of a circle given arc length and arc measure. 
Families of Polar Curves: Circles, Cardiods, and Limacon  Concept
Math › Precalculus › Polar Coordinates and Complex Numbers
How to graph the special cases of the family r = a + b cos (theta) when a or b = 0. 
Radii to Tangents  Problem 1
Math › Geometry › Circles
How to calculate the central angle formed by radii to tangents that intersect at a point outside the circle. 
Radii to Tangents  Problem 2
Math › Geometry › Circles
How to calculate the measure of a missing angle in a quadrilateral formed by two circles that are tangent but not congruent and their radii drawn to a common line of tangency. 
Parametrizing a Circle  Problem 1
Math › Precalculus › Vectors and Parametric Equations
How to find parametric equations of a semicircle centered at (0,0) with radius 12, oriented counterclockwise. 
Circumference  Concept
Math › Geometry › Circles
How to calculate the circumference of a circle. 
Circumference  Problem 2
Math › Geometry › Circles
How to find the radius of a circle given circumference. 
Secants  Concept
Math › Geometry › Circles
How to define a secant; how to find the length of various secants in circles. 
Radii to Tangents  Concept
Math › Geometry › Circles
How to define a tangent line; how to determine the angle a radius to a tangent forms. 
Circumference  Problem 4
Math › Geometry › Circles
How to find the circumference of a figure formed by two different circles and a straight line. 
Circumference  Problem 1
Math › Geometry › Circles
How to calculate the circumference of a circle given diameter or radius. 
Families of Polar Curves: Circles, Cardiods, and Limacon  Problem 2
Math › Precalculus › Polar Coordinates and Complex Numbers
How to graph members of the polar family r = a + b cos (theta) when a > b > 0. 
Families of Polar Curves: Circles, Cardiods, and Limacon  Problem 3
Math › Precalculus › Polar Coordinates and Complex Numbers
How to graph members of the polar family r = a + b*cos(theta) when 0 < a < b. 
Arc Length  Problem 1
Math › Geometry › Circles
How to find the length of an arc given a radius and arc length. 
Arc Length  Concept
Math › Geometry › Circles
How to define arc length and how it is different from arc measure; how to calculate the length of an arc.