# 3D Trigonometry

To solve problems involving trigonometry in 3D shapes students are taught to identify 2D right-angled triangles and apply the Sine, Cosine and Tangent ratios.  As learning progresses they consider square based pyramids in addition to cubes and cuboids.
##### Differentiated Learning Objectives
• All students should be able to calculate a length in a 3D shape using 2D representations of right angled triangles
• Most students should be able to calculate an angle in a 3D shape using 2D representations of right angled triangles.
• Some students should be able to calculate a combination of length and angle in a 3D shape using 2D representations of right angled triangles

### Mr Mathematics Blog

#### Area of Compound Shapes

To find the area of compound shapes students need to understand what the word compound means.  Therefore, I ask students to discuss in pairs a definition for the word compound and to extend it to include the shapes below.  As a result of their learning in science students agree that a compound can be defined […]

#### Priorities for the Spring Term

At the start of the Spring Term these are three main priorities for me as the Head of Mathematics.

#### Mutually Exclusive Outcomes and Events

I teach mutually exclusive outcomes directly after students have encountered Venn diagrams. This is the fifth Year 8 Probability lesson.