Understanding Angles

The video tutorial by Gis introduces the concept of angles, highlighting their importance in everyday life. It explains the formation of angles using rays and vertices, and how to name them. The tutorial covers measuring angles in degrees using a protractor and classifies angles into null, acute, right, obtuse, shallow, and complete turn angles. The lesson concludes with a summary and practical examples to reinforce understanding.

Which of the following is NOT an example of angles used in daily life?

• A car's speed

• A skateboard maneuver

• The take-off of a plane

• A ballerina's turn

What is the correct way to name an angle formed by rays OA and OB?

• Angle OAB

• Angle BAO

• Angle AOB

• Angle BOA

What is the vertex in the angle CVD?

• Point O

• Point V

• Point D

• Point C

What is the unit of measurement for angles?

• Radians

• Degrees

• Meters

• Inches

Which tool is used to measure angles?

• Scale

• Ruler

• Compass

• Protractor

What is a null angle?

• An angle measuring 180 degrees

• An angle measuring 360 degrees

• An angle measuring 0 degrees

• An angle measuring 90 degrees

Which angle is greater than 0 degrees but less than 90 degrees?

• Right angle

• Acute angle

• Obtuse angle

• Shallow angle

What is the measure of a right angle?

• 180 degrees

• 360 degrees

• 0 degrees

• 90 degrees

Which angle measures exactly 180 degrees?

• Null angle

• Acute angle

• Complete turn angle

• Shallow angle

What is an example of a complete turn angle?

• A clock hand moving from 12 to 3

• A skateboarder doing a half-pipe

• A ballerina spinning 360 degrees

• A plane taking off