# 3D Geometry | Maths with Lemon

Source: https://mathswithlemon.io/ai-geometry-trigonometry-3d%20geometry.html


#### Surface Area of Complex Shapes


##### What you have to know:

- You must be able to manipulate algebraic expressions. (If not, check this lesson)
- You must know the formulas of surface area and volume of 3D shapes. (If not, check this file)

##### Key Points

- 1. Watch the video:

#### Volume of 3D Solids


##### What you have to know:

- How to factorise a quadratic expression.

##### Key Points

- 1. Watch the video:

#### 3D Pythagoras


##### What you have to know:

- The basic trigonometric properties. (If not, check this lesson)

##### Key Points

- 1. Watch the video:

#### Angles of Elevation and Depression


##### What you have to know:

- The basic trigonometric properties. (If not, check this lesson)

##### Key Points

- 1. Watch the video:

### IB Past Paper Problems

Select a topic and unit, then click the button below to get a new problem.

Press the button to start!

How was this problem?