Which type of arc lies between the two sides of a central angle and measures less than 180°?

Minor arc

Step-by-step explanation:

We are given that  measure of central angle is less than 180 degrees.

We have to find the type of arc lies between the two sides of a central angle and measures less than 180 degrees.

Arc: It is defined as the part of circumference of circle.

There are two types of arc:

Major arc and

Minor arc

The arc lies between the two sides of a central angle are called major and minor arc.

When large arc lies between two sides of  a central angle and measure of the arc is greater than 180 degrees then the arc is called major arc.

The small part of circumference of circle lies between two sides of central angle and its measure is less than 180 degrees  is called minor arc.