Measuring and Constructing Angles

The video tutorial revises the concept of angles, explaining that an angle is formed by two rays with a common endpoint called the vertex. It covers how to measure angles using a protractor, detailing the steps to align and read the protractor correctly. The tutorial also demonstrates constructing angles of specific degrees, providing step-by-step instructions for drawing and measuring angles accurately.

What is the common endpoint of two rays that form an angle called?

• Arm

• Line

• Vertex

• Base

Which part of an angle is always written in the middle when naming it?

• Degree

• Vertex

• Arm

• Endpoint

What is the common endpoint of ray qp and ray qr called?

• Base

• Vertex

• Line

• Arm

What tool is used to measure and draw angles?

• Protractor

• Compass

• Set Square

• Ruler

In what unit is the measurement of an angle expressed?

• Degrees

• Inches

• Radians

• Meters

Where should the central point of the protractor be placed when measuring an angle?

• On the endpoint

• On the arm

• On the vertex

• On the base

When measuring an angle, from which side should you read the protractor scale?

• Bottom

• Left

• Right

• Top

What is the degree measure of angle LMN?

• 60 degrees

• 75 degrees

• 90 degrees

• 120 degrees

What is the degree measure of angle PIV?

• 150 degrees

• 135 degrees

• 120 degrees

• 90 degrees

What is the first step in constructing an angle using a protractor?

• Mark the vertex

• Draw a ray

• Draw a line

• Measure the angle