CCSS What is an angle bisector

The video tutorial explains the concept of an angle bisector, starting with a brief introduction to the terms 'angle' and 'bisector'. It then revisits the concept of a midpoint, illustrating how it divides a line segment into two equal parts. The tutorial further explores how an angle bisector divides an angle into two equal smaller angles, using the example of a straight angle divided into two right angles. The importance of angle bisectors in solving geometric problems is highlighted, emphasizing their role in creating equal angles and aiding in mathematical expressions.

What is the role of a midpoint in a line segment?

• It divides the line segment into two unequal parts.

• It divides the line segment into two equal parts.

• It marks the end of the line segment.

• It is the starting point of the line segment.

How does an angle bisector affect an angle?

• It leaves the angle unchanged.

• It divides the angle into two equal parts.

• It doubles the angle.

• It triples the angle.

What is the result of bisecting a 180-degree angle?

• Two 120-degree angles

• Two 90-degree angles

• Two 45-degree angles

• Two 60-degree angles

Why is understanding angle bisectors important in problem-solving?

• It helps in creating expressions to find missing values.

• It is not useful in problem-solving.

• It makes angles disappear.

• It changes the shape of geometric figures.

What can be inferred if an angle is bisected?

• The two resulting angles are unequal.

• The angle becomes smaller.

• The two resulting angles are equal.

• The angle becomes larger.