Q:
# What Is a 90-Degree Angle?

A 90-degree angle has an internal angle equivalent to 90 degrees and forms a perfect L shape. It is also known as a right angle.

Continue ReadingNinety-degree angles are found in both geometry and trigonometry. A small square in the angle's corner symbolizes it as 90 degrees. A circle contains 360 degrees, and a right angle is 90 of that 360 degrees. It is one-quarter of the full circle, which gives a 90-degree angle its L shape. A 90-degree angle can be rotated in any direction and still have an internal angle of 90 degrees. If a triangle has a 90-degree angle, it is known as a right triangle.

Learn more about Geometry-
Q:
## What Is an Orthogonal Vector?

A: An orthogonal vector is a vector that is at an angle of 90 degrees, or perpendicular, to another vector. Up to three vectors can be mutually orthogonal to ... Full Answer >Filed Under: -
Q:
## How Do You Measure Angles?

A: Use a protractor to measure the number of degrees in an angle. Place the protractor over the angle so that one line goes along the protractor's zero degree... Full Answer >Filed Under: -
Q:
## What Is Rotational Symmetry?

A: If a shape or image can be rotated less than 360 degrees and still retain the same appearance, this shape has rotational symmetry. For example, a five-poin... Full Answer >Filed Under: -
Q:
## What Is a Concave Quadrilateral?

A: A concave quadrilateral is a shape that has four sides and contains an indentation where the internal angle is greater than 180 degrees. The most common ex... Full Answer >Filed Under: