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Similar Polygons

"Two polygons are similar if their corresponding angles are congruent and the corresponding sides have a constant ratio (in other words, if they are proportional). Typically, problems with similar pol ...

Square Matrix Inverse

"We use the identity matrix to calculate a square matrix inverse. In order to be invertible, a matrix must be square, and by finding the square matrix inverse, we can find the solution of a system of ...

Triangle Inequality

"The triangle inequality theorem states that the sum of any two sides of a triangle must be greater than the length of the third side. To find a range of values for the third side when given two lengt ...

Parallel Lines Theorem

"If two lines are intersected by a transversal, then alternate interior angles, alternate exterior angles, and corresponding angles are congruent. The converse of the theorem is true as well. If two ...

Sum of Polygon Angles

"The sum of the angles in any polygon is equal to the number of sides in the polygon minus two, all multiplied by 180 degrees. Sum of polygon angles problems may ask you to determine the sum of angles ...

"Solving ""Less Than"" Absolute Value Inequalities"

" Fuente: BrightStorm"Solving "Less Than" Absolute Value Inequalities" es un contenido didáctico (en inglés) de ©Brightstorm, un espacio educativo especializado en vídeo-tutoriales de ciencias (Matemá ...

The Discriminant

"The discriminant is the term underneath the square root in the quadratic formula and tells us the number of solutions to a quadratic equation. If the discriminant is positive, we know that we ha ...

Solving Absolute Value Equations

" Fuente: BrightStormSolving Absolute Value Equations es un video-tutorial (en inglés) a modo de 'píldora de formación' de ©Brightstorm. En Brightstorm hallarás más de dos mil vídeos educativos de cie ...

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