292 Videos for "circle"

Area of an Annulus  Problem 2
Math › Geometry › Area
How to calculate the area between two circles, given the radius of the smaller circle and the distance between the circles. 
Area of an Annulus  Problem 3
Math › Geometry › Area
How to find the distance between two circles given the area of the annulus and the radius of the smaller circle. 
Using the Pythagorean Theorem to find a Missing Hypotenuse  Problem 4
Math › Geometry › Pythagorean Theorem
How to find the radius of a circle centered at the origin, given the (x, y) coordinates of a point on the circle. 
Using the Pythagorean Theorem to find a Missing Hypotenuse  Problem 4
Math › Trigonometry › Pythagorean Theorem
How to find the radius of a circle centered at the origin, given the (x, y) coordinates of a point on the circle. 
Perimeter  Concept
Math › Geometry › Geometry Building Blocks
How to define perimeter and calculate it for squares, rectangles, and circles. 
Area of a Sector  Concept
Math › Geometry › Area
How to derive the formula to calculate the area of a sector in a circle. 
Trigonometric Identities  Concept
Math › Trigonometry › Trigonometric Functions
How to use the unit circle to derive the tangent identity and the Pythagorean identity. 
Constructing the Incenter  Problem 1
Math › Geometry › Constructions
How to construct the inscribed circle of a triangle using a compass and straightedge. 
Trigonometric Identities  Concept
Math › Precalculus › Trigonometric Functions
How to use the unit circle to derive the tangent identity and the Pythagorean identity. 
Area of a Sector  Problem 2
Math › Geometry › Area
How to find the radius of a circle when the area and arc measure are given. 
Trigonometric Identities  Problem 3
Math › Precalculus › Trigonometric Functions
How to use the unit circle to show that sine and cosine have period 2?, and tangent has period ?. 
Trigonometric Identities  Problem 3
Math › Trigonometry › Trigonometric Functions
How to use the unit circle to show that sine and cosine have period 2?, and tangent has period ?. 
Trigonometric Identities  Problem 2
Math › Trigonometry › Trigonometric Functions
How to use the unit circle to show that cosine is an even function, and sine and tangent are odd functions. 
The Definitions of Sine and Cosine  Concept
Math › Trigonometry › Trigonometric Functions
How we define sine and cosine for all angle measures using the unit circle. 
Graphing the Reciprocal Trigonometric Functions  Concept
Math › Trigonometry › Trigonometric Functions
How to use the unit circle to derive identities that are useful in graphing the reciprocal trigonometric functions. 
Trigonometric Identities  Problem 2
Math › Precalculus › Trigonometric Functions
How to use the unit circle to show that cosine is an even function, and sine and tangent are odd functions. 
Graphing the Reciprocal Trigonometric Functions  Concept
Math › Precalculus › Trigonometric Functions
How to use the unit circle to derive identities that are useful in graphing the reciprocal trigonometric functions. 
The Definitions of Sine and Cosine  Concept
Math › Precalculus › Trigonometric Functions
How we define sine and cosine for all angle measures using the unit circle. 
The Distance Formula in Polar Coordinates  Problem 3
Math › Precalculus › Polar Coordinates and Complex Numbers
How to derive the polar equation of a circle given its center and radius. 
Area of an Annulus  Concept
Math › Geometry › Area
How to derive the formula for the area of an annulus.