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A right triangle ABC with its right angle at C, hypotenuse c, and legs a and b,. A right triangle or right-angled triangle, sometimes called an orthogonal triangle or rectangular triangle, is a triangle in which two sides are perpendicular, forming a right angle (1 ⁄ 4 turn or 90 degrees).
A curvilinear triangle is a shape with three curved sides, for instance, a circular triangle with circular-arc sides. (This article is about straight-sided triangles in Euclidean geometry, except where otherwise noted.) Triangles are classified into different types based on their angles and the lengths of their sides.
This is a list of two-dimensional geometric shapes in Euclidean and other geometries. ... Right triangle. 30-60-90 triangle; Isosceles right triangle; Kepler triangle;
In this context, the shape is sometimes called a spherical triangle, [47] [49] [50] which should not be confused with spherical triangle meaning a triangle on the surface of a sphere. In its use in Gothic church architecture, the three-cornered shape of the Reuleaux triangle may be seen both as a symbol of the Trinity , [ 51 ] and as "an act of ...
Polyforms based on isosceles right triangles, with sides in the ratio 1 : 1 : √ 2, are known as polyabolos. An infinite number of them are rep-tiles. Indeed, the simplest of all rep-tiles is a single isosceles right triangle. It is rep-2 when divided by a single line bisecting the right angle to the hypotenuse.
Hemihelix, a quasi-helical shape characterized by multiple tendril perversions; ... Right triangle. 30-60-90 triangle; Isosceles right triangle; Kepler triangle;
Every equable triangle has an inradius of 2. [1] [2] A two-dimensional equable shape (or perfect shape) is one whose area is numerically equal to its perimeter. [3] For example, a right angled triangle with sides 5, 12 and 13 has area and perimeter both with a unitless numerical value of 30.
Set square shaped as 45° - 45° - 90° triangle The side lengths of a 45° - 45° - 90° triangle 45° - 45° - 90° right triangle of hypotenuse length 1.. In plane geometry, dividing a square along its diagonal results in two isosceles right triangles, each with one right angle (90°, π / 2 radians) and two other congruent angles each measuring half of a right angle (45°, or ...