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## Isosceles triangle

en.wikipedia.org/wiki/Isosceles_triangle

In geometry, an isosceles triangle is a triangle that has two sides of equal length. Sometimes it ... In the equilateral triangle case, since all sides are equal, any side can be ... which goes thro...

## Right triangle definition - Math Open Reference

www.mathopenref.com/righttriangle.html

Notice it always remains a right triangle, because the angle ∠ABC is always 90 ... A right triangle can also be isosceles if the two sides that include the right ...

## Types of Triangles - CSN

sites.csn.edu/istewart/Math116/TrianglesAngles/triangles.html

For example, in the triangle ABC above, we can refer to angle "A", angle "B", and angle "C". ... The three angles of an equilateral triangle are also equal. ... is called altitude or height of the triangle, if and only if, the two lines form a right angle.

## Right Triangle -- from Wolfram MathWorld

mathworld.wolfram.com/RightTriangle.html

Special cases of the right triangle include the isosceles right triangle (middle ... The inradius can be found by equating the area of the triangle DeltaABC ... are right triangles and the corresponding legs are equal, the hypotenuses are also ...

## Right Angled Triangles - Math is Fun

www.mathsisfun.com/right_angle_triangle.html

A right angled triangle (also called a right triangle) ... triangle (I also put 90°, but you don't need to!) ... It has no equal sides so it is a scalene right angled triangle  ...

## Properties of an Isosceles Triangle

www.math.washington.edu/~king/coursedir/m444a04/notes/02-PropertiesIsosTriangle.html

Theorem: Let ABC be an isosceles triangle with AB = AC. ... This can't be quite deduced from the B&B form of the axioms. ... AMB = angle AMC = right angle (so line MA is the perpendicular bisector of BC and also the altitude of ABC through A).

## Can an isosceles triangle be an equilateral triangle? - Quora

www.quora.com/Can-an-isosceles-triangle-be-an-equilateral-triangle

depends on which definition you use for “isosceles triangle”! ... definition of an isosceles triangle, equilateral triangle ABC is also an isosceles triangle;² So, .... of a triangle and figure out if its scalene, isosceles, equilateral or right angle triangle .

## Tim's Triangular Page - Sakharov.net

sakharov.net/triangle.html

A triangle can also be defined as a three-sided polygon. ... The two acute angles of an isosceles right triangle measure 45 degrees. ... If BD is a height going from the right-angle vertex, then triangles ABC, ABD, and BDC are all similar.

## The 30°-60°-90° triangle. Topics in trigonometry. - The Math Page

www.themathpage.com/atrig/30-60-90-triangle.htm

They are special because, with simple geometry, we can know the ratios of their sides. ... Solve the right triangle ABC if angle A is 60°, and side c is 10 cm. ... Since the triangle is equilateral, it is also equiangular, and therefore the the angle at ...

## Triangle of Medians

jwilson.coe.uga.edu/EMAT6680Fa09/Essani/Assignment 6/roziassign6.html.htm

Will an isosceles original triangle generate and isosceles triangle of medians? ... will the original triangle and the medians triangle both be right triangles? ... We see that the triangle of medians CDE for right triangle ABC is not a right triangle. ... We can also show that our triangle of medians is ¾th the area of the original ...

### Types of Triangles and the Pythagorean Theorem - CSN

sites.csn.edu

For example, in the triangle ABC above, we can refer to angle "A", angle "B", and angle "C". ... For example, in the triangle below, we could also name angle "A" as angle ... A right isosceles triangle is a triangle with exactly two equal sides.

### Triangle Classifications | WyzAnt Resources - Tutors

www.wyzant.com

ABC describes a triangle whose vertices are the points A, B, and C. We can place the ... Note that, by definition, equilateral triangles can also be classified as isosceles. ... (1) Classify the triangle below as acute, obtuse, right, or equiangular .