355 Videos for "angle"

Constructing an Angle Bisector  Problem 2
Math › Geometry › Constructions
How to construct a 45 degree angle. 
Angles in Semicircles and Chords to Tangents  Problem 2
Math › Geometry › Circles
How to solve for arcs and angles formed by a chord drawn to a point of tangency. 
The HalfAngle Identities  Concept
Math › Trigonometry › Advanced Trigonometry
How to use the power reduction formulas to derive the halfangle formulas. 
Triangle Side and Angle Inequalities  Problem 1
Math › Geometry › Triangles
How to list the angles of a triangle from smallest to largest given the side lengths. 
Angle Bisectors and Opposite Side Ratios  Concept
Math › Geometry › Similarity
How to relate the sides of an angle bisected and the lengths of the opposite side. 
Polygon Angle Sum  Problem 2
Math › Geometry › Polygons
How to find the number of sides of a polygon when you know the sum of its angles. 
The Angle Between Vectors  Problem 4
Math › Precalculus › Vectors and Parametric Equations
How to derive the formula for the angle between two vectors. 
The Angle Between Vectors  Problem 3
Math › Precalculus › Vectors and Parametric Equations
How to compute one of the angles of a triangle when you are given the coordinates of its three vertices. 
The HalfAngle Identities  Concept
Math › Precalculus › Advanced Trigonometry
How to use the power reduction formulas to derive the halfangle formulas. 
Triangle Side and Angle Inequalities  Problem 2
Math › Geometry › Triangles
How to list the sides of a triangle from longest to shortest given the measures of the interior angles. 
Polygon Angle Sum  Problem 3
Math › Geometry › Polygons
How to apply the polygon angle sum theorem when you need to solve for x. 
The Angle Between Vectors  Problem 1
Math › Precalculus › Vectors and Parametric Equations
How to compute the angle between two vectors. 
Triangle Side and Angle Inequalities  Problem 3
Math › Geometry › Triangles
How to list the sides of adjacent triangles from shortest to longest given the measures of some interior angles. 
The Angle Between Planes  Problem 2
Math › Precalculus › Vectors and Parametric Equations
How to find the angle between two planes. 
Central Angles and Intercepted Arcs  Concept
Math › Geometry › Circles
How to define a central angle and find the measure of its intercepted arc; how to describe the intercepted arcs of congruent chords. 
The Angle Between Planes  Concept
Math › Precalculus › Vectors and Parametric Equations
How to find the angle between planes, and how to determine if two planes are parallel or perpendicular. 
Central Angles and Intercepted Arcs  Problem 2
Math › Geometry › Circles
How to find the arc and angle measure when a diameter is given, as well as a radius and a chord drawn between the two. 
Other Forms of the Cosine DoubleAngle Formula  Concept
Math › Trigonometry › Advanced Trigonometry
How to derive two more cosine doubleangle formulas. 
Other Forms of the Cosine DoubleAngle Formula  Concept
Math › Precalculus › Advanced Trigonometry
How to derive two more cosine doubleangle formulas. 
Evaluating Sine and Cosine at Other Special Angles  Concept
Math › Precalculus › Trigonometric Functions
How to measure the sine and cosine of 150.