Definition of isosceles
1 of a triangle : having two equal sides — see triangle illustration. 2 of a trapezoid : having the two nonparallel sides equal.
What does mark as an isosceles triangle mean?
When a triangle has two congruent sides it is called an isosceles triangle. The angles opposite to the two sides of the same length are congruent.
What does isosceles mean kids?
Kids Definition of isosceles triangle
: a triangle having two sides of equal length.
Where does the name isosceles come from?
An isosceles triangle therefore has both two equal sides and two equal angles. The name derives from the Greek iso (same) and skelos (leg).
Where is the word isosceles from?
Terminology, classification, and examples
“Isosceles” is made from the Greek roots “isos” (equal) and “skelos” (leg). The same word is used, for instance, for isosceles trapezoids, trapezoids with two equal sides, and for isosceles sets, sets of points every three of which form an isosceles triangle.
Can a right triangle be isosceles?
A right triangle may be isosceles or scalene. In an obtuse triangle, one angle is greater than a right angle? it is more than 90 degrees. An obtuse triangle may be isosceles or scalene.
What does an isosceles triangle add up to?
Like any other triangle, there are three angles in an isosceles triangle which adds up to 180 degrees. Out of the three interior angles, the angles apart from the apex angle are equal in measure.
How do you identify an isosceles triangle?
A triangle with two sides of equal length is an isosceles triangle. The two equal sides of an isosceles triangle are known as ‘legs’ whereas the third or unequal side is known as the ‘base’.
What is of isosceles trapezium?
In Euclidean geometry, an isosceles trapezoid (isosceles trapezium in British English) is a convex quadrilateral with a line of symmetry bisecting one pair of opposite sides. It is a special case of a trapezoid.
What do you call a type of shape that has 5 sides?
A pentagon is a polygon that has 5 sides and 5 vertices.
What is the meaning of isosceles trapezium?
: a trapezoid with its two nonparallel sides equal.
What does it mean to be called obtuse?
Definition of obtuse
2a : lacking sharpness or quickness of sensibility or intellect : insensitive, stupid He is too obtuse to take a hint. b : difficult to comprehend : not clear or precise in thought or expression It is also, unfortunately, ill-written, and at times obtuse and often trivial.— Shirley Hazzard.
What is isosceles obtuse triangle?
An isosceles obtuse triangle is a triangle in which one of the three angles is obtuse (lies between 90 degrees and 180 degrees) and the other two acute angles are equal in measurement. One example of isosceles obtuse triangle angles is 30°, 30°, and 120°.
What is the prefix of isosceles?
“having two equal sides,” 1550s, from Late Latin isosceles, from Greek isoskeles “with equal legs; isosceles; that can be divided into two equal parts,” from isos “equal, identical” (see iso-) + skelos “leg,” from PIE *skel-es-, from root *skel- “bend, curve” (see scoliosis).
How do you spell isosceles in English?
(of a straight-sided plane figure) having two sides equal: an isosceles triangle; an isosceles trapezoid.
What is a synonym for isosceles?
In this page you can discover 3 synonyms, antonyms, idiomatic expressions, and related words for isosceles, like: equilateral, scalene and equilateral-triangle.
