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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


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 and the Pythagorean Theorem - CSN


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.

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


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 ...

Triangles - Developmental Math Topic Text


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

Tim's Triangular Page - Sakharov.net


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.

Math Scene - Triangles - Lesson 1 - Rasmus


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> .

Triangle Classifications | WyzAnt Resources - Tutors


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 .

Can an isosceles triangle be an equilateral triangle? - Quora


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 .

Right Triangles - Clark University


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.

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Right Triangle -- from Wolfram MathWorld


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


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  ...

Greatest possible measure of ∠ A in an isosceles triangle A B C


Sep 10, 2014 ... It also generally makes it a more interesting question, with no unnecessary ... Then you would have an isosceles right triangle, and B C , the ...