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##### Asked by: Virginica Alarma

science space and astronomy# Do angles on a straight line add up to 180?

The

**angles on a straight line add up to 180**degrees. So x + y =**180**.

Thereof, is a 180 degree angle a straight line?

A **straight angle** is **180degrees**.

**Horizontal**angles are usually expressed in

**degrees**. A full circle is divided into 360

**degrees**,abbreviated as 360° . Note from the figure these two particularvalues: a 90° angle , called a right angle, is made of twoperpendicular

**lines**.

Similarly, it is asked, what is an 180 degree angle?

right **angle**-an 90 **degree angle**. obtuse**angle**-an **angle** between 90 and **180 degrees**.straight **angle**-a **180 degree angle**.

A **straight angle** is exactly 180 degrees and iscomposed of exactly one **line** with no changes in vector. Any**line** through it will form four **angles** (two on eitherside of the **straight angle**). Additionally, any twocontiguous **angles** must be supplementary or equal 180degrees.