Readers ask: What is a triangle?

How do you define a triangle?

A triangle has three sides, three vertices, and three angles. The sum of the three interior angles of a triangle is always 180°. The sum of the length of two sides of a triangle is always greater than the length of the third side. A triangle with vertices P, Q, and R is denoted as △PQR.

What is the best definition of a triangle?

A triangle is defined by it’s number of sides. It is a closed three sided figure with the interior angles being equal to 180 degrees. Apart from that, triangles can have lots of variations.

Does a triangle have 3 equal sides?

Equilateral. An equilateral triangle has three equal sides and angles. It will always have angles of 60° in each corner.

What are the 3 sides of triangle?

There are three types of triangle based on the length of the sides: equilateral, isosceles, and scalene.

What are the elements of a triangle?

A triangle is a closed figure made of three line segments. Every triangle has three sides, three angles, and three vertices. These are known as the parts of a triangle.

What are parts of a triangle?

A triangle is a shape formed when three straight lines meet. All triangles have three sides and three corners (angles). The point where two sides of a triangle meet is called a vertex.

What is another name for Triangle?

In this page you can discover 20 synonyms, antonyms, idiomatic expressions, and related words for triangle, like: pyriform, pyramid, deltoid, triangular, trigon, set-square, deltoidal, trigonal, triangulum, trilateral and pyramidal.

How many types of triangles are there?

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.

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What are the sides of a triangle called?

The side opposite to the right angle is the hypotenuse, the longest side of the triangle. The other two sides are called the legs or catheti (singular: cathetus) of the triangle.

How do you find the side lengths of a triangle?

Use the side lengths to classify the triangle as acute, right, or obtuse. Classify the triangle as acute, right, or obtuse. Compare the square of the length of the longest side with the sum of the squares of the lengths of the two shorter sides.

What is an uneven triangle called?

(iii) Scalene triangle: if none of the three sides of a triangle are equal to each other, it is called a scalene triangle. Properties of the scalene triangle: All angles of a scalene triangle are unequal.

Does 4 5 6 make right triangles?

The three numbers 4, 5, 6 make a Pythagorean Triple (they could be the sides of a right triangle).

How do you find the side of a triangle given two sides?

Right Triangles and the Pythagorean Theorem

  1. The Pythagorean Theorem, a2+b2=c2, a 2 + b 2 = c 2, can be used to find the length of any side of a right triangle.
  2. The side opposite the right angle is called the hypotenuse (side c in the figure).

How do you know if its a right triangle?

A right triangle is a triangle in which one of the angles is a 90∘ angle. A triangle can be determined to be a right triangle if the side lengths are known. If the lengths satisfy the Pythagorean Theorem (a2+b2=c2) then it is a right triangle.

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