269 Videos for "triangle"

Polygon Angle Sum  Concept
Math › Geometry › Polygons
How to derive the formula to find the sum of angles in any polygon. 
Equiangular Polygon Sums  Concept
Math › Geometry › Polygons
How to find the measure of one angle in any equiangular or regular polygon. 
Solving Literal Equations  Problem 1
Math › Algebra › Solving Equations
How to solve literal equations about area of a triangle. 
Equiangular Polygon Sums  Problem 1
Math › Geometry › Polygons
How to find the measure of one angle in a regular nonagon. 
Tangent Segments to a Circle  Problem 1
Math › Geometry › Circles
How to find the lengths of a triangle circumscribed about a circle. 
Rotational Symmetry  Problem 1
Math › Geometry › Transformations
How to draw a figure with a given degree of rotational symmetry. 
Solving Formulas  Problem 2
Math › Geometry › Area
How to solve the area of a sector formula for the radius. 
Area of Regular Polygons  Concept
Math › Geometry › Area
How to derive the formula to calculate the area of a regular polygon. 
Vertex and Diagonals  Concept
Math › Geometry › Geometry Building Blocks
How the vocabulary word vertex applies to different objects in Geometry. 
Glide Reflections  Problem 1
Math › Geometry › Transformations
How to perform a glide reflection on a triangle in the coordinate plane given a translation rule and a line to reflect over. 
Solving Formulas  Problem 3
Math › Geometry › Area
How to solve the area of a regular polygon formula for the side length. 
Solving Formulas  Problem 1
Math › Geometry › Area
How to solve for one of the bases of a trapezoid in the trapezoid area formula. 
Constructing the Incenter  Problem 1
Math › Geometry › Constructions
How to construct the inscribed circle of a triangle using a compass and straightedge. 
Constructing the Circumcenter  Problem 1
Math › Geometry › Constructions
How to construct the circumscribed circle of a triangle using a compass and straightedge. 
Area of Regular Polygons  Problem 1
Math › Geometry › Area
How to calculate the area of a regular polygon, given the length of the apothem and side length. 
The Tangent Function  Concept
Math › Trigonometry › Trigonometric Functions
How to define the tangent function for all 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. 
Constructing the Centroid  Problem 2
Math › Geometry › Constructions
How to find missing lengths in a triangle where the three medians are drawn creating the centroid. 
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.