Definition and properties of acute triangles ... Try this Drag the orange dots on each vertex to reshape the triangle. If any angle becomes 90 degrees or more, it is not an acute triangle.
www.mathopenref.com/acutetriangle.html www.mathopenref.com/acutetriangle.html
A triangle in which all three angles are acute angles. A triangle which is neither ... Manheimer, W. "Dissecting an Obtuse Triangle into Acute Triangles. ...
mathworld.wolfram.com/AcuteTriangle.html mathworld.wolfram.com/AcuteTriangle.html
Triangle - Wikipedia, the free encyclopedia
A triangle is one of the basic shapes of geometry: a polygon with three corners or vertices and three sides or edges which are line segments. A triangle with vertices A , B , and C is denoted ...
en.wikipedia.org/wiki/Triangle
A triangle in which all three angles are acute; Examples:;
www.hbschool.com/glossary/math2/define/gr5/acute_triang... www.hbschool.com/glossary/math2/define/gr5/acute_triangle5.html
A triangle that has one obtuse angle; Example:;
www.hbschool.com/glossary/math2/define/gr5/obtuse_trian... www.hbschool.com/glossary/math2/define/gr5/obtuse_triangle5.html
A triangle for which all interior angles are acute. ... Obtuse triangle ... this page updated 29-jul-08 ; Mathwords: Terms and Formulas from Algebra I to Calculus written, illustrated, and webmastered by Bruce Simmons...
www.mathwords.com/a/acute_triangle.htm www.mathwords.com/a/acute_triangle.htm
An acute triangle has three acute angles. An acute angle is an angle that measures less than 90 degrees; so, in an acute triangle, each angle has a measure of less than 90 degrees. Equilateral triangles are always acute angles.
ellerbruch.nmu.edu/classes/CS255W05/cs255students/rober... ellerbruch.nmu.edu/classes/CS255W05/cs255students/robertsb/P9/acute.html
An acute triangle is a triangle with all three angles less than 90°. ... An altitude of a triangle is a line segment connecting a vertex to the line containing the opposite side and perpendicular to that side.
www.learner.org/channel/courses/learningmath/geometry/k... www.learner.org/channel/courses/learningmath/geometry/keyterms.html
Polygon; Regular polygon; Vertex; Triangle; Equilateral triangle; Isosceles triangle; Scalene triangle; Acute triangle; Obtuse triangle; Right triangle; Quadrilateral; Rectangle; Square; Parallelogram; Rhombus; Trapezoid; Pentagon; Hexagon; Heptagon; Octagon; Nonagon; Decagon; Circle; Convex...
www.mathleague.com/help/geometry/polygons.htm
Definitions