3D Trigonometry Problems

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Card 1 of 43.3.2

3.3.2

Question

First step in 3D trig problems?

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Card 1process

Question

First step in 3D trig problems?

Answer

Sketch and isolate a right triangle in 3D shape.

💡 Hint

Convert 3D to connected 2D triangles.

Card 2process

Question

How to find space diagonal of cuboid?

Answer

Use Pythagoras twice or 3D distance formula.

💡 Hint

d = sqrt(l^2 + w^2 + h^2).

Card 3concept

Question

Why are bearings often paired with 3D trig?

Answer

Need plan view + elevation view for full geometry.

💡 Hint

Handle horizontal distance first.

Card 4comparison

Question

Common error in 3D trig IB questions?

Answer

Using wrong triangle for angle asked.

💡 Hint

Identify which plane contains the angle.

Read the notes

Full study notes for 3D Trigonometry Problems

Topic 3.3 hub

Angles of elevation and depression