## What are the 3 sides of a triangle called?

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.

## How do you find the largest side of a triangle?

The longest side of a triangle is opposite the largest interior angle, and the shortest side is opposite the smallest angle. As a result, without knowing the exact lengths of the sides of a triangle, it is possible to put them in order of length based solely on the given angle measurements.

## How do you find the length of the long side of a right triangle?

Given that the hypotenuse of a right triangle is and one side is , find the other side length. Explanation: To find the length of the missing side, you can either use the pythagorean theorm or realize this is a case of a special right triangle with sides . Thus, the other side length is .

## What are the two shorter sides of a triangle called?

A right triangle has two shorter sides, or legs, and the longest side, opposite the right angle, which is always called the hypotenuse.

## What is a 3d triangle called?

Triangular Pyramid, aka Tetrahedron. A pyramid with a triangular base. A tetrahedron made up of four equilateral triangles is called a regular tetrahedron.

## Which is the shortest side of a triangle?

In a triangle: The shortest side is always opposite the smallest interior angle.

## What is the shortest side of a right triangle?

The third side–the side opposite the right angle–is called the hypotenuse of the right triangle. The two shorter sides are usually called “legs.” This formula is called the Pythagorean Theorem in honor of Pythagoras.

## How do you know that a certain side is the longest side in acute triangle?

In a right triangle, the hypotenuse is the longest side, an “opposite” side is the one across from a given angle, and an “adjacent” side is next to a given angle.

## Does 9 12 15 make a right triangle?

Explanation: By virtue of the Pythagorean Theorem, in a right triangle the sum of the squares of the smaller two sides equals the square of the largest side. Only 9, 12, and 15 fit this rule.

## Does 5/12/13 make a right triangle?

The best known triple is 3-4-5, with 5-12-13 being the next most recognized. Any triangle composed of sides of lengths that match the Pythagorean triple will be a right triangle. That means our triangle has a 90 degree angle for angle C. For our triangle we now know that a = 5, b = 12, c = 13 and C = 90 degrees.

## How do you find the length of the third side of a triangle?

In particular, the Law of Cosines can be used to find the length of the third side of a triangle when you know the length of two sides and the angle in between. To use the Law of Sines to find a third side: 1. Identify angle C. It is the angle whose measure you know.

## Why do triangles add up to 180?

In other words, the other two angles in the triangle (the ones that add up to form the exterior angle) must combine with the angle in the bottom right corner to make a 1800 angle. The inevitable conclusion of this game is that the interior angles of a triangle must always add up to 1800.

## Who discovered triangle?

History. The Pascal triangle is named after the mathematician, Blaise Pascal, who was born in 1623. However, the triangle was used around the world centuries before. The picture shows a representation of Pascal’s triangle made in the 1300s in China.

## Who invented triangle?

Blaise Pascal

Photo in the article by “Wikipedia” `https://en.wikipedia.org/wiki/Altitude_(triangle)`