Credit: flatworldsedge CC-BY-SA 2.0
Q:

# What is a 180-degree angle called?

A:

A 180-degree angle is called a straight angle. Angles that are exactly 90 degrees are called right angles, while those that are between 0 and 90 degrees are called acute. Angles that are between 90 and 180 degrees are considered obtuse.

Know More

## Keep Learning

Once an angle is larger than 180 degrees, it is categorized as a reflex angle. As a reflex angle turns one full rotation of 360 degrees, a circle is formed.

Angles are created when two straight lines intersect. The place where the two lines meet is called the vertex, while the two lines are called the arms of the angle. Rotating one of the arms either increases or decreases the angle measurement depending upon the direction of rotation.

Sources:

## Related Questions

• A:

A linear pair is a geometric term for two intersecting lines with a 180-degree angle. It is also known as a conjecture, or hypothesis, of linear pairs. Linear pairs require unshared sides of the angles to create rays on opposite sides.

Filed Under:
• 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 each other in a three-dimensional space.

Filed Under:
• A:

For each vector, the angle of the vector to the horizontal must be determined. Using this angle, the vectors can be split into their horizontal and vertical components using the trigonometric functions sine and cosine. The horizontal components for the vectors are solved separately from the vertical. The combined horizontal and vertical components are solved using the Pythagorean theorem to reach the final answer.