A: ### Quick Answer

**A right triangle, also known as a right-angled triangle, always has one angle at 90 degrees.** The side directly opposite this angle is known as the hypotenuse, which is the longest side of a triangle.

If the lengths of two sides of a triangle are known, it is possible to calculate the length of the third side using Pythagoras' theorem. This theorem states that the sum of the square of the hypotenuse is equal to the sum of the squares on the other two sides. This theorem only applies to right triangles.

When a right triangle has sides with lengths that are each an integer, it's called a Pythagorean triangle.

Learn more about Shapes- Q:
## What is the definition of "obtuse triangle"?

A:

Full Answer >**An obtuse triangle is any triangle that has an angle of more than 90 degrees.**This differs from an acute triangle, in which all three angles are less than 90 degrees, and a right triangle, in which one angle is exactly 90 degrees.Filed Under: - Q:
## What are the 30-60-90 triangle rules?

A:A 30-60-90 triangle has interior angles equal to 30, 60 and 90 degrees. This is always a right triangle with the 90-degree angle located opposite the longest side of the triangle and the 30 degree angle located opposite the smallest side. The sides of a 30-60-90 triangle are always in a 1:root 3:2 ratio with each other, where 2 represents the longest side of the triangle.

Full Answer >Filed Under: - Q:
## What is an isosceles triangle?

A:

Full Answer >**An isosceles triangle is a specific type of triangle where only two of the side lengths and two of the internal angles are equal.**There are also other types of triangles like equilateral triangles and scalene triangles.Filed Under: - Q:
## What is the definition of "hypotenuse"?

A:

Full Answer >**In geometry, the term "hypotenuse" refers to the side of a right triangle that is opposite the right angle, which is also the longest side.**Geometric and trigonometric problems typically use the hypotenuse in the Pythagorean Theorem.Filed Under:

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