Does A Triangle Have To Have Straight Edges?

What type of triangle can have one right angle?

equilateral trianglesTypes of Triangles.

All equilateral triangles are equiangular.

All equiangular triangles are equilateral.

A right triangle will have 1 right angle and 2 acute angles..

Do triangles always have a right angle?

The right triangle has one 90 degree angle and two acute (< 90 degree) angles. Since the sum of the angles of a triangle is always 180 degrees... The two sides of the triangle that are by the right angle are called the legs... and the side opposite of the right angle is called the hypotenuse.

What do you call a triangle with curved sides?

A Reuleaux triangle [ʁœlo] is a shape formed from the intersection of three circular disks, each having its center on the boundary of the other two. … Reuleaux triangles have also been called spherical triangles, but that term more properly refers to triangles on the curved surface of a sphere.

What does 1 line on a triangle mean?

Tick marks (shown in orange) indicate sides of a shape that have equal length (sides of a shape that are congruent or that match). The single lines show that the two vertical lines are the same length while the double lines show that the two diagonal lines are the same length.

What is the rule for sides of a triangle?

According to the first triangle inequality theorem, the lengths of any two sides of a triangle must add up to more than the length of the third side. This means that you cannot draw a triangle that has side lengths 2, 7 and 12, for instance, since 2 + 7 is less than 12.

Can a triangle have 3 right angles?

No, real, triangle can have three right angles. … The sum of the angles formed must equal 180° and the sum of the length of two sides must be greater than the length of the third.

What are the conditions to form a triangle?

A triangle has three sides, three angles, and three vertices. The sum of all internal angles of a triangle is always equal to 180°. This is called the angle sum property of a triangle.

What are the types of right triangles?

There are three types of special right triangles, 30-60-90 triangles, 45-45-90 triangles, and Pythagorean triple triangles.

What are the 7 triangles?

To learn about and construct the seven types of triangles that exist in the world: equilateral, right isosceles, obtuse isosceles, acute isosceles, right scalene, obtuse scalene, and acute scalene.

What is the 3 4 5 Triangle rule?

A 3-4-5 right triangle is a triangle whose side lengths are in the ratio of 3:4:5. In other words, a 3-4-5 triangle has the ratio of the sides in whole numbers called Pythagorean Triples.

Can a triangle have a curved side?

There are two ways I triangle can have curved sides—in one case the sides curve in, and in the other the sides curve out. In the first case, the triangle is called “hyperbolic”—see Hyperbolic triangle —and in the the second, the triangle is called “spherical”—see Spherical geometry .

What does 3 lines on a triangle mean?

The dashes on the lines show they are equal in length. The angles at the base of the equal sides are equal. An equilateral triangle has 3 sides of equal length. The dashes on the lines show they are equal in length.

What do you call a triangle with one curved side?

Circular horn triangle. In geometry, a circular triangle is a triangle with circular arc edges.

Is a Squircle a real shape?

A squircle is a shape intermediate between a square and a circle. … The word “squircle” is a portmanteau of the words “square” and “circle”.

What do parallel lines mean on a triangle?

If a line parallel to one side of a triangle intersects the other two sides of the triangle, then the line divides these two sides proportionally.

Does a triangle need to have straight sides?

If one is just talking about the convex hulls of three pairs of half planes formed by geodesics, then the sides are, pretty much by definition, “straight” intrinsically. However, when one looks at the triangle extrinsically, the triangle need not have straight sides in the Euclidean sense if we want to be pedantic.

What are the 3 sides of a triangle?

Every triangle has three sides and three angles, some of which may be the same. The sides of a triangle are given special names in the case of a right triangle, with the side opposite the right angle being termed the hypotenuse and the other two sides being known as the legs.

Can 1 acute and 2 obtuse form a triangle?

An obtuse triangle (or obtuse-angled triangle) is a triangle with one obtuse angle (greater than 90°) and two acute angles. Since a triangle’s angles must sum to 180° in Euclidean geometry, no Euclidean triangle can have more than one obtuse angle.