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...

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 ...

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.

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 ...

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
...

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).

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
.

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.

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 ...

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 ...