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Acute Triangle -- from Wolfram MathWorld
A triangle in which all three angles are acute angles. A triangle which is neither acute nor a right triangle (i.e., it has an obtuse angle) is called an obtuse triangle. From the law of cosines, for a triangle with side lengths a, b, and c, cosC=(a^2+b^2-c^2)/(2ab), with C the angle opposite side C. For an angle to be acute, cosC>0.

Acute and obtuse triangles - Wikipedia
An acute triangle (or acute-angled triangle) is a triangle with three acute angles (less than 90°). 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.. Acute and obtuse triangles are the two ...

Definition of Acute Triangle - Maths Resources
A triangle that has all angles less than 90° (90° is a Right Angle) See: Obtuse Triangle Triangles - Equilateral, Isosceles and Scalene

Triangle Classification - Cut-the-Knot
A triangle is scalene if all of its three sides are different (in which case, the three angles are also different). If two of its sides are equal, a triangle is called isosceles.A triangle with all three equal sides is called equilateral.S. Schwartzman's The Words of Mathematics explain the etymology (the origins) of the words. The first two are of Greek (and related) origins; the word ...

Acute Triangle: Practice Finding Area | Worksheet ...
Geometry got her down? Help your little one get acquainted with acute triangles. This cheerful worksheet challenges her to use clues to determine the area of each triangle on this page.

Which set of numbers can represent the side lengths, in ...
1. Let the sides of a triangle be a, b and c.Assume c is the largest side.The maximum angle measure in an acute triangle can be 90°. In such a case we would hav…

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.

Can you solve the unstoppable blob riddle? | The Kid ...
A shooting star crashes onto Earth and a hideous blob emerges. It creeps and leaps, it glides and slides. It’s also unstoppable: no matter what you throw at it, it just re-grows and continues its rampage.

Definition of Obtuse Triangle - Math Is Fun
A triangle that has an angle greater than 90° See: Acute Triangle Triangles - Equilateral, Isosceles and Scalene

Triangle Facts for Kids - Equilateral, Isosceles, Scalene ...
Triangle Facts for Kids. Enjoy a range of interesting triangle facts for kids and have fun learning about the 3-sided polygon. Find information related to equilateral triangles, isosceles triangles, scalene triangles, obtuse triangles, acute triangles, right angle triangles, the hypotenuse, angles of a triangle and more.




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