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/Math120/Geometry/triangles.html

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.

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 ...

www.montereyinstitute.org/courses/DevelopmentalMath/COURSE_TEXT2_RESOURCE/U07_L1_T3_text_final.html

Identify equilateral, isosceles, scalene, acute, right, and obtuse triangles. · Identify
... Its name also indicates that this polygon has three angles. The prefix “poly” ...

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.rasmus.is/uk/t/F/Su55k01.htm

It is also common practice to label the side opposite angle A with a small a, ... If
we know one angle in an isosceles triangle we can find the other angles. ... The
sides of a right angled triangle ABC satisfy Pythagoras' rule, that is a<sup>2</sup> + b<sup>2</sup> = c<sup>2</sup> .

www.wyzant.com/resources/lessons/math/geometry/triangles/triangle_classifications

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
.

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
.

www2.clarku.edu/~djoyce/trig/right.html

Also, tan A = a/b, so b = a/tan A = 15/tan 41 = 15/0.8693 = 17.256. ... In the next
few problems, the triangles aren't right triangles, but you can solve them using
what you know about ... An equilateral triangle ABC has three 60° vertex angles.