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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.

Acute and obtuse triangles - Wikipedia
An obtuse triangle (or obtuse-angled triangle) is a triangle with one obtuse angle (greater than 90°) and two acute angles. Since a triangle's angles must sum to 180° in Euclidean geometry, no Euclidean triangle can have more than one obtuse angle.

Obtuse Triangle -- from Wolfram MathWorld
An obtuse triangle is a triangle in which one of the angles is an obtuse angle. (Obviously, only a single angle in a triangle can be obtuse or it wouldn't be a triangle.) A triangle must be either obtuse, acute, or right. From the law of cosines, for a triangle with side lengths a, b, and c, cosC=(a^2+b^2-c^2)/(2ab), (1) with C the angle opposite side C.

Obtuse 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 ...

Obtuse triangle - definition of obtuse triangle by The ...
Define obtuse triangle. obtuse triangle synonyms, obtuse triangle pronunciation, obtuse triangle translation, English dictionary definition of obtuse triangle. n. a triangle with one obtuse angle.

How to Calculate Area of an Obtuse Triangle | Sciencing
An obtuse triangle is any triangle that contains an obtuse angle -- an angle that is greater than 90 degrees.The formula for finding the area of an obtuse triangle is the same as for other triangles, area = 1/2 x (base x height).However, because an obtuse triangle's height does not match the height of any of its sides, the method of finding the height of the figure is different.

Acute, Obtuse, and Right Triangles - homeschoolmath.net
This is a free geometry lesson for 4th grade about acute, obtuse, and right triangles (classification according to angles). It contains varied exercises, including several where students explore these concepts -- and even the angle sum of a triangle -- by drawing.

Obtuse Triangle Calculator | Find Area and Perimeter of an ...
Obtuse Triangle Calculator. An angle which is more than 90 degree and less than 180 is obtuse angle. a triangle with one angle as obtuse is called as the obtuse triangle. Find the area and perimeter of an obtuse triangle with height, base and sides of the triangle.

Definition of obtuse triangle | Dictionary.com
Obtuse triangle definition, a triangle with one obtuse angle. See more.

Triangles - Equilateral, Isosceles and Scalene
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.

 

 

 

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