25 Videos for "sum of angles"

Triangle Angle Sum  Concept
Math › Geometry › Triangles
How to apply the triangle angle sum theorem. 
Polygon Angle Sum  Concept
Math › Geometry › Polygons
How to derive the formula to find the sum of angles in any polygon. 
Triangle Angle Sum  Problem 1
Math › Geometry › Triangles
How to apply the triangle angle sum theorem in order to find missing angles. 
Polygon Angle Sum  Problem 1
Math › Geometry › Polygons
How to find the sum of the angles when you know the number of sides of a polygon. 
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. 
Triangle Angle Sum  Problem 2
Math › Geometry › Triangles
How to apply the triangle angle sum theorem when you need to solve for x. 
Polygon Angle Sum  Problem 3
Math › Geometry › Polygons
How to apply the polygon angle sum theorem when you need to solve for x. 
Exterior Angles of a Polygon  Concept
Math › Geometry › Polygons
How to find the sum of the exterior angles in a polygon and find the measure of one exterior angle in an equiangular polygon. 
Vertical Angles  Problem 1
Math › Geometry › Reasoning, Diagonals, Angles and Parallel Lines
How to find the measure of an angle using the Triangle Angle Sum Theorem and vertical angles. 
Exterior Angles of a Polygon  Problem 2
Math › Geometry › Polygons
How to find a missing exterior angle of a pentagon, given four other angles. 
Exterior Angles of a Polygon  Problem 1
Math › Geometry › Polygons
How to find the measures of the three exterior angles of a triangle in terms of a variable. 
Supplementary and Complementary Angles  Problem 1
Math › Geometry › Geometry Building Blocks
How to use angle measures to identify supplementary and complementary angles. 
Supplementary and Complementary Angles  Concept
Math › Geometry › Geometry Building Blocks
How to identify supplementary and complementary angles. 
The DoubleAngle Formulas  Concept
Math › Trigonometry › Advanced Trigonometry
How to use the sine and cosine addition formulas to prove the doubleangle formulas. 
The DoubleAngle Formulas  Concept
Math › Precalculus › Advanced Trigonometry
How to use the sine and cosine addition formulas to prove the doubleangle formulas. 
Equiangular Polygon Sums  Concept
Math › Geometry › Polygons
How to find the measure of one angle in any equiangular or regular polygon. 
Equiangular Polygon Sums  Problem 2
Math › Geometry › Polygons
How to find the number of sides in an equiangular polygon given the measure of one angle. 
Equiangular Polygon Sums  Problem 1
Math › Geometry › Polygons
How to find the measure of one angle in a regular nonagon. 
Equiangular Polygon Sums  Problem 3
Math › Geometry › Polygons
How to find the measure of angles in regular polygons that share sides. 
The Sine Addition Formulas  Problem 2
Math › Trigonometry › Advanced Trigonometry
How to derive the sine of a difference formula and use it to find the sine of an angle.