80 Videos for "polygons"

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. 
Polygon Angle Sum  Concept
Math › Geometry › Polygons
How to derive the formula to find the sum of angles in any 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. 
Polygon Angle Sum  Problem 3
Math › Geometry › Polygons
How to apply the polygon angle sum theorem when you need to solve for x. 
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. 
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 3
Math › Geometry › Polygons
How to find the measure of angles in regular polygons that share sides. 
Exterior Angles of a Polygon  Problem 2
Math › Geometry › Polygons
How to find a missing exterior angle of a pentagon, given four other angles. 
Polygons  Concept
Math › Geometry › Geometry Building Blocks
How to define a polygon, how to distinguish between concave and convex polygons, how to name polygons. 
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. 
Equiangular Polygon Sums  Problem 1
Math › Geometry › Polygons
How to find the measure of one angle in a regular nonagon. 
Polygons  Problem 2
Math › Geometry › Geometry Building Blocks
How to identify corresponding sides and angles of congruent polygons. 
Center and Apothem of Regular Polygons  Concept
Math › Geometry › Area
How to define the apothem and center of a polygon; how to divide a regular polygon into congruent triangles. 
Polygons  Problem 1
Math › Geometry › Geometry Building Blocks
How to mark equiangular, equilateral, and regular polygons. 
Circumscribed and Inscribed Circles and Polygons  Concept
Math › Geometry › Constructions
How to define circumscribed and inscribed circles and polygons relative to each other. 
Number of Diagonals in a Polygon  Concept
Math › Geometry › Reasoning, Diagonals, Angles and Parallel Lines
How to determine the number of diagonals in a polygon. 
Number of Diagonals in a Polygon  Problem 1
Math › Geometry › Reasoning, Diagonals, Angles and Parallel Lines
How to determine the number of diagonals in a polygon when you know the number of sides. 
Center and Apothem of Regular Polygons  Problem 1
Math › Geometry › Area
How to find the length of an apothem in a regular polygon given a side length and the number of sides. 
Number of Diagonals in a Polygon  Problem 2
Math › Geometry › Reasoning, Diagonals, Angles and Parallel Lines
How to determine the number of sides in a polygon when you know the number of diagonals.