what is a equilateral
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- equilateral. adj. 1. (Mathematics) having all sides of equal length: an equilateral triangle. n. 2. (Mathematics) a geometric figure having all its sides of equal length. 3. (Mathematics) a side that is equal in length to other sides. (ˌi kwəˈlaet kwəˈlæt ər, əl ˌɛk-). wə. adj
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Symbols, Signs&Flags In Euclidean plane geometry, a rectangle is any quadrilateral with four right angles. It can also be defined as an equiangular quadrilateral, since equiangular means that all of its angles are equal (360°/4 = 90°).
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An equilateral triangle is isosceles..HOW CAN THIS BE? equilateral triangle means all 3 angles are the same = 60 degree. isosceles triangle means 2 of the angles are the same. Since in equilateral triangle, more than 2 angles are already the same, naturally it can be considered as isosceles.
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Shape: Quadrilateral Quadrilateral. A quadrilateral is a polygon that has exactly four sides. (This also means that a quadrilateral has exactly four vertices, and exactly four angles.).  Some examples of quadrilaterals: Discussions of 2-D shapes sometimes refer only to the boundary (the line segments that form the edges of the figure) or to the interior as well.
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What is a Quadrilateral? A Rhombus is a Quadrilateral in which opposite sides are parallel and all four sides are of equal length. A rectangle is a quadrilateral with four right-angles and opposite sides that are parallel.
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Undefined: Points, Lines, and Planes So - back to triangles: An Equilateral Triangle is still Isosceles. It does have two equal sides (and more). It also has two equal angles (and more)! Acute is a somewhat different property but clearly all angles of an equilateral triangle are less than 90 degrees. When possible we just find it easier to think, and problem solve, in mathematics, with inclusive definitions.
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Congruent 1 Congruent Angles angles are angles that have the same measure. 2  An equilateral triangle has all its angles measuring 60°. So, the angles of an equilateral triangle are Congruent Angles.  A square and a rectangle have all their angles measuring 90°.
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- Cf. Rhombus, Rhumb.] 1. (Geom.) An equilateral parallelogram, or quadrilateral figure whose sides are equal and the opposite sides parallel. The angles may be unequal, two being obtuse and two acute, as in the cut, or the angles may be equal, in which case it is usually called a square.
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- Proofs concerning equilateral triangles. AboutTranscript. Sal proves that the angles of an equilateral triangle are all congruent (and therefore they all measure 60°), and conversely, that triangles with all congruent angles are equilateral. Created by Sal Khan.
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How Many Lines Of Symmetry Does An Equilateral Triangle Have? An Equilateral Triangle is the one which is characterized by three equal sides and opposite angles of 60 degrees measure each. Lines of Symmetry in any shape are the line about which area of shape is divided into equal parts. We may have varying number of lines of symmetry in regular shapes.
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Quadrilateral 1 Rectangle: all four angles are right angles. 2  An equivalent condition is that the diagonals bisect each other and are equal in length. 3  Informally: a box or oblong (including a square). 4  Square (regular quadrilateral): all four sides are of equal length (equilateral), and all four angles are right angles. Kite: two pairs of adjacent sides are of equal length. 2  This implies that one diagonal divides the kite into congruent triangles, and so the angles between the two pairs of equal sides are equal in measure. 3  It also implies that the diagonals are perpendicular.
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Talk:Triangle/Archive 1 Noun[edit] ( 1 geometry) A triangle having at least two sides equal.  Usage notes[edit] In original usage, an isosceles triangle was understood to have the third side unequal to the other two, that is, an isosceles triangle has exactly two equal sides. An equilateral triangle is, however, a special case of an isosceles triangle, having all three sided equal. Of trilateral figures, an equilateral triangle is that which has its three sides equal, an isosceles triangle that which has two of its sides alone equal, and a scalene triangle that which has its three sides unequal.
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- The equilateral triangle: In the equilateral triangle, all the sides are the same length (congruent) and all the angles are the same size (congruent). Since the sum of the angles of a triangle is always 180 degrees, we can figure out the measure of the angles of an equilateral triangle: The isosceles triangle:
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- Triangles classified by the length of their sides, are either equilateral with all the sides of equal length, isosceles with two sides of equal length, or scalene with no sides of equal length (BOS, 2002, pp.
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Triangle In an equilateral triangle, all sides are the same length. An equilateral triangle is also a regular polygon with all angles 60°. In an isosceles triangle, at least two sides are equal in length. An isosceles triangle also has two equal angles: the angles opposite the two equal sides. In a scalene triangle, all sides and internal angles are different from one another. By internal angles. Triangles can also be classified according to their internal angles, measured here in degrees.
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GULLIVER'S TRAVELS Take for example an equilateral Triangle -- who represents with us a Tradesman of the respectable class. Flatland by Abbott, Edwin View in context. In the first course, there was a shoulder of mutton cut into an equilateral triangle, a piece of beef into a rhomboides, and a pudding into a cycloid.
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Rectangle In Euclidean plane geometry, a rectangle is a quadrilateral with four right angles. It can also be defined as an equiangular quadrilateral, since equiangular means that all of its angles are equal. It can also be defined as a parallelogram containing a right angle. A rectangle with four sides of equal length is a square. The term oblong is occasionally used to refer to a non-square rectangle. A rectangle with vertices ABCD would be denoted as ABCD. The word rectangle comes from the Latin rectang
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- An equilateral triangle is one in which all three sides are congruent (same length). Because it also has the property that all three interior angles are equal, it really the same thing as an equiangular triangle. See Equiangular triangles.
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Flatland A romance of many dimensions An isosceles triangle is one that has two sides of the same length and one side different An equilateral triangle is one that has all of its sides of equal length. All of the … angles on an equilateral triangle are 60 degrees. A triangle with two sides 4cm and one side 100m would be an isosceles. But an equilateral triangle has all of the sides exactly the same so therefore an isosceles triangle can never ever be an equilateral triangle.
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Square Square. A square is a regular quadrilateral. All of its angles are equal (90°). All of its sides are of equal length. Opposite sides are parallel. The diagonals bisect each other at 90°. The diagonals are equal in length. It has 4 lines of symmetry. Order of rotational symmetry: 4.ectangle. All angles are equal (90°). Opposite sides are of equal length. Opposite sides are parallel. The diagonals bisect each other. The diagonals are equal in length. It has 2 lines of symmetry.
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Quadrilateral In Euclidean plane geometry, a quadrilateral is a polygon with four edges (or sides) and four vertices or corners. Sometimes, the term quadrangle is used, by analogy with triangle, and sometimes tetragon for consistency with pentagon (5-sided), hexagon (6-sided) and so on. Kite: two pairs of adjacent sides are of equal length. 2  This implies that one diagonal divides the kite into congruent triangles, and so the angles between the two pairs of equal sides are equal in measure. 3  It also implies that the diagonals are perpendicular.
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Proofs concerning equilateral triangles Sal proves that the angles of an equilateral triangle are all congruent (and therefore they all measure 60°), and conversely, that triangles with all congruent angles are equilateral. Sal proves that the angles of an equilateral triangle are all congruent (and therefore they all measure 60°), and conversely, that triangles with all congruent angles are equilateral.
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- Isosceles triangle has one line of symmetry, equilateral have 3 lines of symmetry because they have 3 equal sides and a scalene has 3 different sides so no lines of symmetry. waspy · 8 years ago.
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Rhombus The rhombus has a square as a special case, and is a special case of a kite and parallelogram. In Euclidean geometry, a rhombus(◊) (plural rhombi or rhombuses) is a simple (non-self-intersecting) quadrilateral whose four sides all have the same length. Another name is equilateral quadrilateral, since equilateral means that all of its sides are equal in length.
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Types of Triangles In the equilateral triangle, all the sides are the same length (congruent) and all the angles are the same size (congruent). Since the sum of the angles of a triangle is always 180 degrees, we can figure out the measure of the angles of an equilateral triangle: The isosceles triangle: The isosceles triangle (I can NEVER remember how to spell isosceles) has two sides that are the same length (congruent) and two angles that are the same size (congruent).
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How many types of triangles are there? PROPERTIES OF EQUILATERAL TRIANGLE. 1. All three sides and three angles are equal. 2. The three angles are 60 degrees each. 3. The angle bisectors, the medians and the perpendicular bisectors of the three sides coincide. It is also the centroid. 4. The incenter and the circumcenter coincide and are within the triangle. 5.