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Triangles - Equilateral, Isosceles and Scalene - Math is Fun

www.mathsisfun.com/triangle.html

Equilateral, Isosceles and Scalene. There are three special names given to triangles that tell how many sides (or angles) are equal. There can be 3, 2 or no ...

Definition of a Triangle

www.geom.uiuc.edu/~wanous/definitionofatriangle.html

Examples of Triangles. A triangle is a special kind of shape. What do you think makes a shape a triangle? Be sure to think about this question before going on ...

Triangle -- from Wolfram MathWorld

mathworld.wolfram.com/Triangle.html

A triangle is a 3-sided polygon sometimes (but not very commonly) called the trigon. Every triangle has three sides and three angles, some of which may be the  ...

Chapter 6: The triangle and its properties | Grade 7 (NCERT) | Khan ...

www.khanacademy.org/math/in-seventh-grade-math/triangle-pror

Here we will learn two special types of triangles: Equilateral and Isosceles. A triangle in which all the three sides are of equal lengths and the measure of each  ...

Types of Triangles - BrainPOP

www.brainpop.com/math/geometryandmeasurement/typesoftriangles/

Triangles abound in this BrainPOP triangle movie! In it, Tim and Moby introduce you to one of the sharpest shapes around. You'll find out exactly what a triangle ...

Triangles | Geometry | Khan Academy

www.khanacademy.org/math/geometry-home/triangle-properties

You probably like triangles. You think they are useful. They show up a lot. What you'll see in this topic is that they are far more magical and mystical than you ...

Polygons - Triangles - First Glance - Math.com

www.math.com/school/subject3/lessons/S3U2L2GL.html

As you learned in the last lesson, a triangle is the simplest polygon, having three sides and three angles. The sum of the three angles of a triangle is equal to 180 ...

Classifying triangles 1 | Triangle types | Khan Academy

www.khanacademy.org/math/geometry-home/triangle-properties/geometry-classifying-triangles/v/scalene-isosceles-equilateral-acute-right-obtuse

Sal categorizes triangles as scalene, isosceles, equilateral, acute, right, or obtuse .

Identify triangles by side lengths | Triangle types | Triangles ...

www.khanacademy.org/math/geometry-home/triangle-properties/geometry-classifying-triangles/e/recognizing-triangles

Practice identifying triangles by their side-lengths as equilateral, isosceles, or scalene.

Find angles in triangles | Triangle angles | Equations and geometry ...

www.khanacademy.org/math/algebra-basics/alg-basics-equations-and-geometry/alg-basics-triangle-angles/e/triangle_angles_1

Find missing angle measures in triangles using the properties of general triangles, isosceles triangles, and equilateral triangles.

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Triangles - Fact Monster

www.factmonster.com

Triangles. A triangle has three sides and is made of straight lines. A triangle may be classified by how many of its sides are of equal length. Or, it may be ...

Cool math .com - Types of Triangles

www.coolmath.com

Definitions and formulas for triangles including right triangles, equilateral triangles, isosceles triangles, scalene triangles, obtuse triangles and acute triangles.

Triangle definition and properties - Math Open Reference

www.mathopenref.com

Altitude, The altitude of a triangle is the perpendicular from the base to the opposite vertex. (The base may need to be extended). Since there are three possible ...