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Acute triangle definition - Math Open Reference
In any triangle, two of the interior angles are always acute (less than 90 degrees) *, so there are three possibilities for the third angle: . Less than 90° - all three angles are acute and so the triangle is acute. Exactly 90° - it is a right triangle Greater than 90° (obtuse): the triangle is an obtuse triangle In the figure above, drag the vertices around and try to create all 3 ...
Triangle Classification - Cut-the-Knot
Triangle Classification: as regard the sides and the angles. Inclusive and exclusive definitions
Geometric Probability - Interactive Mathematics Miscellany ...
Geometric Probability. Random events that take place in continuous sample space may invoke geometric imagery for at least two reasons: due to the nature of the problem or due the the nature of the solution.. Some problems, like Buffon's needle, Birds On a Wire, Bertrand's Paradox, or the problem of the Stick Broken Into Three Pieces do, by their nature, arise in a geometric setting.
Triangle Circumcenter definition - Math Open Reference
One of several centers the triangle can have, the circumcenter is the point where the perpendicular bisectors of a triangle intersect. The circumcenter is also the center of the triangle's circumcircle - the circle that passes through all three of the triangle's vertices.As you reshape the triangle above, notice that the circumcenter may lie outside the triangle.
Triangle Types and Classifications: Isosceles, Equilateral ...
Triangles can be classified by various properties relating to their angles and sides. The most common classifications are described on this page.
Scalene Triangle -- from Wolfram MathWorld
A scalene triangle is a triangle that has three unequal sides, such as those illustrated above.
Figures and Polygons - Math League
Polygon. A polygon is a closed figure made by joining line segments, where each line segment intersects exactly two others. Examples: The following are examples of polygons:
Online Triangle Calculator. Enter any valid values and ...
Math Warehouse's popular online triangle calculator: Enter any valid combination of sides/angles(3 sides, 2 sides and an angle or 2 angle and a 1 side) , and our calculator will do the rest! It will even tell you if more than 1 triangle can be created.
Triangle - Wikipedia
A triangle is a polygon with three edges and three vertices.It is one of the basic shapes in geometry.A triangle with vertices A, B, and C is denoted .. In Euclidean geometry any three points, when non-collinear, determine a unique triangle and simultaneously, a unique plane (i.e. a two-dimensional Euclidean space).In other words, there is only one plane that contains that triangle, and every ...
Isosceles Triangle -- from Wolfram MathWorld
An isosceles triangle is a triangle with (at least) two equal sides. In the figure above, the two equal sides have length b and the remaining side has length a. This property is equivalent to two angles of the triangle being equal. An isosceles triangle therefore has both two equal sides and two equal angles. The name derives from the Greek iso (same) and skelos (leg).