Camera Angles and Lens Sizes

The video tutorial explores how angle measurement can aid in selecting security cameras for a store. It begins by introducing the concept of angle decomposition and recomposition, using a 90-degree angle as an example. The tutorial then shifts focus to a store layout, where two cameras are already installed. The store owner evaluates the coverage of these cameras and calculates the missing angles that need to be covered. Finally, the tutorial guides viewers on choosing the appropriate camera lens to ensure full coverage of the store, emphasizing the importance of precise angle measurement in real-world applications.

What was the main issue faced by the store owner regarding the security cameras?

• The cameras were not installed properly.

• The cameras did not cover the cash register area.

• The cameras had poor image quality.

• The cameras were too expensive.

How can a 90-degree angle be decomposed?

• Into two 45-degree angles

• Into 60 degrees and 30 degrees

• Into three 30-degree angles

• Into 70 degrees and 20 degrees

What lens size does the blue camera have?

• 10 millimeters

• 8 millimeters

• 12 millimeters

• 6 millimeters

How many degrees does the red camera cover?

• 86 degrees

• 94 degrees

• 58 degrees

• 28 degrees

What is the total angle covered by the existing cameras?

• 58 degrees

• 180 degrees

• 28 degrees

• 86 degrees

What is the missing angle that needs to be covered by a new camera?

• 94 degrees

• 86 degrees

• 28 degrees

• 58 degrees

What is the angle of a straight line?

• 360 degrees

• 180 degrees

• 45 degrees

• 90 degrees

Which lens size would leave a small part of the store not in view?

• 5 millimeters

• 3 millimeters

• 3.6 millimeters

• 4 millimeters

What is the advantage of choosing a 3-millimeter lens?

• It has better image quality.

• It is easier to install.

• It covers more than needed.

• It is cheaper.

What is the main learning objective of this lesson?

• To find unknown angles in real-world situations

• To calculate the cost of cameras

• To understand camera installation

• To learn about different camera brands