350 Videos for "angles"

Converse of Parallel Lines Theorem  Problem 1
Math › Geometry › Reasoning, Diagonals, Angles and Parallel Lines
How to solve for a variable to make lines parallel. 
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. 
Number of Handshakes at a Party  Problem 1
Math › Geometry › Reasoning, Diagonals, Angles and Parallel Lines
How to determine the number of handshakes possible when you know the number of people at a party. 
Isosceles Triangles  Problem 2
Math › Geometry › Triangles
How to solve for the measure of the vertex angle of an isosceles triangle given an exterior angle. 
Isosceles Triangles  Problem 3
Math › Geometry › Triangles
How to solve for a variable used to measure the angles of an isosceles triangle. 
Isosceles Triangles  Problem 1
Math › Geometry › Triangles
How to solve for the side length and base angle measures of an isosceles triangle. 
Parallelogram Properties  Problem 1
Math › Geometry › Polygons
How to solve for variables that describe the angles in a parallelogram. 
Cyclic Quadrilaterals and Parallel Lines in Circles  Problem 1
Math › Geometry › Circles
How to calculate angles in a cyclic quadrilateral given arc measures and two angle measures. 
Trapezoid Properties  Problem 2
Math › Geometry › Polygons
How to find all the angles in an isosceles trapezoid, given one angle. 
Trapezoid Properties  Problem 1
Math › Geometry › Polygons
How to find all the angles in an isosceles trapezoid, given one angle. 
The Definitions of Sine and Cosine  Problem 1
Math › Trigonometry › Trigonometric Functions
How to evaluate sine and cosine when the angle is 0, ?/2, ?, ?. 
The Definitions of Sine and Cosine  Problem 1
Math › Precalculus › Trigonometric Functions
How to evaluate sine and cosine when the angle is 0, ?/2, ?, ?. 
Kite Properties  Problem 3
Math › Geometry › Polygons
How to find the angles in a kite created by the diagonals in terms of a variable. 
Kite Properties  Problem 2
Math › Geometry › Polygons
How to find the vertex and nonvertex angles in a kite. 
Kite Properties  Problem 1
Math › Geometry › Polygons
How to find the angles created by the two diagonals in a kite. 
Similar Triangles in Circles and Right Triangles  Problem 2
Math › Geometry › Similarity
How to find missing side lengths in a right triangle with an altitude drawn from the right angle. 
Cyclic Quadrilaterals and Parallel Lines in Circles  Concept
Math › Geometry › Circles
How to prove that opposite angles in a cyclic quadrilateral are congruent; how to prove that parallel lines create congruent arcs in a circle. 
Radii to Tangents  Concept
Math › Geometry › Circles
How to define a tangent line; how to determine the angle a radius to a tangent forms. 
Using a Protractor  Concept
Math › Geometry › Geometry Building Blocks
How to use a protractor to measure an angle. 
Rotations  Problem 3
Math › Geometry › Transformations
How to find the angle of rotation in an isometry where the point of rotation is not given.