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www.reference.com/motif/Science/diagonal+of+polygons+fo... www.reference.com/motif/Science/diagonal+of+polygons+formula
The formula for diagonals of a polygon is n(n-3)/2. This means, the number of diagonals from a single vertex (angle) is three less than the number of sides, or n-3. That ...
answers.askkids.com/Math/what_is_a_vertex_angle
When you are talking about triangles there are three angles. The angle that is opposite of the base of the triangle is called the vertex angle.
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mathworld.wolfram.com/VertexAngle.html
The point about which an angle is measured is called the angle's vertex, and the angle theta associated with a given vertex is called the vertex angle.
Vertex angle - Wikipedia, the free encyclopedia
en.wikipedia.org/wiki/Vertex_angle
In geometry, a vertex angle is the angle associated with a vertex of a polygon. The vertex angle (denoted by α1 or A1) in a polygon is measured by the interior ...
www.mathopenref.com/vertex.html
For polygons, the included angle at each vertex is an interior angle of the polygon. Vertex is also sometimes used to indicate the 'top' or high point of something, ...
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In an isosceles triangle, the angle formed by the two legs of ...
www.freemathhelp.com/feliz-isosceles.html
The angle located opposite the base is called the vertex. Sample A: The vertex angle B of isosceles triangle ABC is 120 degrees. Find the degree measure of ...
wiki.answers.com/Q/What_is_the_vertex_of_an_angle
No, complementary angles do not need to have the same vertex. Complementary angles are comprised of any two angles whose sum is 90 degrees.
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