## Pythagoras or Trigonometry? (B) worksheet

Suitable for Year groups: 10, 11
GCSE Tier:
Foundation/Higher
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Prerequisite knowledge: Apply Pythagoras’ Theorem and trigonometric ratios to find angles and lengths inright-angled triangles in two dimensional figures.
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## Pythagoras or Trigonometry? (B) worksheet description

Once students are comfortable using Pythagoras’ theorem and trigonometry in right angled triangles, use this worksheet to help them decide which method they should use to solve different problems.

Students will determine whether they should use Pythagoras’ theorem, the sine, cosine, tangent ratio or neither in order to find x in 16 different questions. Questions include calculating missing lengths and angles, finding the perimeter and area of isosceles triangles, calculating a missing angle in a trapezium and showing that a triangle has a right angle.

As an extension, pupils are asked to go back to find x, a nice revision or end of unit exercise.

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