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Definition of Obtuse Triangle - Math is Fun
Math explained in easy language, plus puzzles, games, quizzes, videos and worksheets. For K-12 kids, teachers and parents.

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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.

Triangles - Equilateral, Isosceles and Scalene
Why is the Area "Half of bh"? Imagine you "doubled" the triangle (flip it around one of the upper edges) to make a square-like shape (a parallelogram) which can be changed to a simple rectangle:. THEN the whole area is bh, which is for both triangles, so just one is ½ × bh.

How to construct (draw) the orthocenter of a triangle ...
How to construct the orthocenter of a triangle with compass and straightedge or ruler. The orthocenter is the point where all three altitudes of the triangle intersect. An altitude is a line which passes through a vertex of the triangle and is perpendicular to the opposite side. A Euclidean construction

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 ...

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Obtuse angle | Define Obtuse angle at Dictionary.com
Obtuse angle definition, an angle greater than 90° but less than 180°. See more.

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.

For the Geometric Cabinet (I’ve provided triangle labels ...
isosceles triangle equilateral triangle right-angled triangle scalene triangle acute triangle obtuse-angled scalene triangle right-angled scalene triangle