# Which Triangle Rule to Use

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- Created by: Joanna Gouldsworthy
- Created on: 20-04-13 21:39

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- TRIANGLES
- Is the triangle right-angled?
- Yes
- Does the question involve any angles?
- Yes
- Use basic trig: SOHCAHTOA

- No
- Use Pythagoras' Theorem

- Yes

- Does the question involve any angles?
- No
- Do you know a side and its opposite?
- No
- Use the cosine rule

- Yes
- Use the sine rule

- No

- Do you know a side and its opposite?

- Yes

- Is the triangle right-angled?

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