# There are 366 different Starters of The Day, many to choose from. You will find below some starters on the topic of Trigonometry. A lesson starter does not have to be on the same topic as the main part of the lesson or the topic of the previous lesson. It is often very useful to revise or explore other concepts by using a starter based on a totally different area of Mathematics.

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### Trigonometry Starters: It is called Refreshing Revision because every time you refresh the page you get different revision questions.

## Exercises #### 3D Trigonometry Presentation

A slide presentation (a poem) introducing using trigonometry (including Pythagoras' Theorem) to find lengths and angles on three dimensional shapes. #### Common Trig Ratios

A self-marking exercise on finding the exact values of sine, cosine and tangent of special angles. #### Formulae to Remember

The traditional pairs or pelmanism game adapted to test recognition for formulae required to be memorised for GCSE exams. #### Inverse Trig Calculator

This calculator is designed to find all of the angles for a given trigonometric ratio and show them on a graph. #### Triangle Solver

Provide and three measurements for a triangle and this application will work out the remaining sides, angles and area. #### Trigonometry

20 trigonometry questions in an online, self marking exercise. A self-marking exercise on the sine rule, cosine rule and the sine formula for finding the area of a triangle. #### Which Side?

Arrange the diagrams in groups depending on whether the arrow is pointing to the opposite, adjacent or hypotenuse.

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