3D Trigonometry

The video tutorial simplifies 3D trigonometry by breaking it down into 2D problems, focusing on identifying right-angled triangles within 3D shapes. It demonstrates using Pythagoras and SOHCAHTOA to solve for angles and lengths, with examples like triangle CAG and a square-based pyramid. The tutorial emphasizes accuracy in calculations and provides practice questions. It concludes by highlighting real-life applications of 3D trigonometry, such as in architecture and aviation.

What is the first step in solving a 3D trigonometry problem?

• Calculate the volume

• Find the surface area

• Look for right-angled triangles

• Identify the 3D shape

In the example of the square-based pyramid, what is the base length of the right-angled triangle used?

• 10

• 4

• 2

• 8

Which trigonometric rule is used to find angles in right-angled triangles?

• Cosine Rule

• Tangent Rule

• Sine Rule

• SOHCAHTOA

What is the importance of not rounding values too early in calculations?

• It saves time

• It ensures accuracy

• It simplifies the problem

• It is a requirement of the method

Which of the following is a real-life application of 3D trigonometry?

• Finding the perimeter of a square

• Designing a house

• Measuring the height of a tree

• Calculating the area of a circle