# What kinds of symmetry do an equilateral and an isosceles triangle have?

An equilateral triangle has six symmetries, and an isosceles triangle has two. An isosceles triangle has a single axis of symmetry, the perpendicular bisector of the non-congruent side. This is a reflection symmetry. An equilateral triangle has rotational symmetry as well as reflection symmetry. It is invariant under rotations by 120 degrees.

### What kinds of polygons are symmetrical?

All regular polygons A polygon is symmetrical if its sides that cross the line of symmetry are halved by the line of symmetry and if the sides that do not cross the line of symmetry have the same positions in space, the same lengths, and the same angles with their neighboring sides as do the sides on the other side of the line of symmetry. The only symmetrical triangles are isosceles triangles (equilateral triangles are…

### Are triangles regular?

Yes and no. Being irregular means that all sides and angles are different, thus, giving the shape no symmetry. Regular is just the opposite, of course. Triangles can be both because there can be different kinds of triangles. For example, an equilateral triangle would be regular because all its sides and angles are equal. Now a scalene triangle is different, for none of its sides are equal. Though, there is another triangle, called the isosceles…

### If triangle ABC is congruent to triangle bcd then triangles ABC and bcd are what kinds of triangles?

### How many kinds of triangles?

There are triangles that are named for relationships of their side lengths: scalene has no equal sides Isosceles has 2 equal sides, and equilateral has all 3 sides equal. Then there are names for relationship of angles. Acute has all 3 angles less than a right angle (90Â°). Right has one angle is a right angle (90Â°). Obtuse has one angle greater than 90Â° but less than 180Â°. An equilateral triangle has all three angles…

### What are the kinds of triangle acording to their angles?

equilateral triangle has all angles of 60 degrees isosceles triangle has only two equal angles scalene triangle have no equal angles acute triangle has all angles less than 90 degrees right angle triangle has one angle of 90 degrees obtuse triangle has one angle greater than 90 degrees right isosceles triangle has 90, 45, 45 degree angles assuming two angles are the same: acute isosceles triangle can range from <90,>45,>45 down to >0,<90,<90 obtuse isosceles…

### What are the names of three sided triangles?

All triangles are 3-sided. There are 3 different kinds. One where all 3 sides are equal length and have equal angles is called an Equilateral triangle. A triangle with two sides and angles the same is known as an Isosceles triangle. The last kind of triangle has 3 unequal sides and 3 unequal angles and it is called a Scalene triangle.

### What are the different kinds of triangle?

Triangles can be classified by one of two different criteria. One is by the number of equal sides they have, in that sense, they can be classified as scalene, isosceles and equilateral. Other is the types of angles they posses, in which case they can be classified as either acute, right or obtuse triangles.

### Kinds of triangle according to number of congruent sides?

All triangles have 3 sides and 3 interior angles that add up to 180 degrees. Equilateral triangles have 3 congruent sides. Isosceles triangles have 2 congruent sides. A right angle triangle can have 2 congruent sides if its interior angles are 90, 45, 45 degrees. A scalene or an obtuse triangle has no congruent sides.

### Examples of six kinds of triangle?

There are only three kinds of triangle - equilateral, where all three sides are the same - isoceles, where only two sides are the same - and scalene, where no sides are the same. The right triangle is a special case of the isoceles or scalene. Even if you consider the right triangle different, which is is not, that only make five kinds of triangle.

### What are the diff kinds of triangles?

One way of classifying triangles is by the number of congruent sides (angles). A triangle is equilateral if all its sides are equal. All its angles will also be equal. A triangle is isosceles if two of its sides are equal. The angles at the end of the third side will be equal to one another. A triangle is scalene if all three sides are of different length. In this case, all three angles will…

### What are all the diffent kinds of triangle?

right triangle - has one 90Â° angle Pythagorean triangle - right triangle whose side lengths are all integers oblique triangle - has no 90Â° angle acute triangle - each angle is less than 90Â° obtuse triangle - one angle is greater than 90Â° equilateral triangle - angles are 60Â°-60Â°-60Â° isosceles triangle - has two equal angles scalene triangle - has three different angles rational triangle - all side lengths are rational integer triangle - all…

### What are three ways to classify a triangle by its angles?

The three kinds of triangles are: right triangle :one of the angles is a right angle (i.e. measures 90 degrees) acute: All of the angles measures less than 90 degrees. A special case of acute is the equiangular or equilateral triangle in which all angles measure 60 degrees; obtuse: One of the angles measure more than 90 degrees.