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## Acute and obtuse triangles - Wikipedia

en.wikipedia.org/wiki/Acute_and_obtuse_triangles

An acute triangle is a triangle with all three angles acute (less than 90°). An obtuse triangle is one with one obtuse angle (greater than 90°) and two acute angles ...

## Definition of Acute Triangle - Math is Fun

www.mathsisfun.com/definitions/acute-triangle.html

Triangles - Equilateral, Isosceles and Scalene ... Acute Triangle. more ... Acute Triangle. A triangle that has all angles less than 90° (90° is a Right Angle).

## Acute triangle definition - Math Open Reference

www.mathopenref.com/acutetriangle.html

Definition and properties of acute triangles. ... A triangle where all three internal angles are acute (less than 90 degrees). Try this Drag the orange dots on each ...

## Acute Triangle -- from Wolfram MathWorld

mathworld.wolfram.com/AcuteTriangle.html

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.

## What are Acute, Obtuse, and Right Triangles? | Virtual Nerd

www.virtualnerd.com/pre-algebra/geometry/triangles/define-triangles/triangle-acute-obtuse-right-definition

Note: Did you know that there are different kinds of triangles? Knowing how to identify these triangles is an important part of solving many problems involving ...

## What is an Acute Triangle? - Definition, Facts & Example - Video ...

In this lesson, you'll find out what makes a triangle an acute triangle. You'll also find some examples of what keeps a triangle from being acute....

## Triangles - Fact Monster

www.factmonster.com/ipka/A0876325.html

In an equiangular triangle, all the angles are equal—each one measures 60 degrees. An equiangular triangle is a kind of acute triangle, and is always ...

## Acute, Obtuse, and Right Triangles - Homeschool Math

www.homeschoolmath.net/teaching/g/triangles.php

This is a free geometry lesson for 4th grade about acute, obtuse, and right triangles (classification according to angles). It contains varied exercises, including ...

## Acute Triangle | Acute Triangle Properties | Math@TutorVista.com

math.tutorvista.com/geometry/acute-triangle.html

In acute-angled triangles, all the internal angles are less than 90 degrees. An acute triangle may have the same lengths of sides or different side lengths.