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Triangles - Equilateral, Isosceles and Scalene - Math is Fun


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


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


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 ...


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


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


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


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


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

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


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

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


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

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Triangles - Fact Monster


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


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


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 ...