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In geometry, an isosceles triangle (/ aɪ ˈ s ɒ s ə l iː z /) is a triangle that has two sides of equal length. Sometimes it is specified as having exactly two sides of equal length, and sometimes as having at least two sides of equal length, the latter version thus including the equilateral triangle as a special case.
Download as PDF; Printable version; ... Pages in category "Types of triangles" The following 22 pages are in this category, out of 22 total. ... Isosceles triangle; K.
The unique 6-point isosceles set in the plane. The shaded regions show four of the 20 isosceles triangles formed by triples of these points. In discrete geometry, an isosceles set is a set of points with the property that every three of them form an isosceles triangle.
In geometry, the congruent isoscelizers point is a special point associated with a plane triangle. It is a triangle center and it is listed as X(173) in Clark Kimberling's Encyclopedia of Triangle Centers. This point was introduced to the study of triangle geometry by Peter Yff in 1989. [1] [2]
File:Isosceles triangle made of right triangles.svg. Add languages. Page contents not supported in other languages. ... Printable version; Page information;
Triangles have many types based on the length of the sides and the angles. A triangle whose sides are all the same length is an equilateral triangle, [3] a triangle with two sides having the same length is an isosceles triangle, [4] [a] and a triangle with three different-length sides is a scalene triangle. [7]
Now, triangles ABC and BCD are isosceles, thus (by Fact 3 above) each has two equal angles. Hypothesis: Given AD is a straight line, and AB, BC, and CD all have equal length, Conclusion: angle b = a / 3 . Proof: From Fact 1) above, + = °. Looking at triangle BCD, from Fact 2) + = °.
English: An isosceles right triangle. The legs are length 1, so the hypotenuse is length square root of 2. The legs are length 1, so the hypotenuse is length square root of 2. This file looks better in a web browser.