AQA
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Topic: Angles (Foundation - Unit 3)

Specification References: G2.3

G2.3 Justify simple geometrical properties.


Candidates should be able to:

  • apply mathematical reasoning, explaining and justifying inferences and deductions
  • show step-by-step deduction in solving a geometrical problem
  • state constraints and give starting points when making deductions

Notes

Candidates should be able to explain reasons using words or diagrams.

Candidates should realise when an answer is inappropriate.

Examples

  1. Explain why angles of 99° and 91° do not fit together to make a straight line.

view more examples

  1. Given that one angle in an isosceles triangle is 70°, realise that there are two possible solutions for the other angles.
  2. Given that one angle in an isosceles triangle is 90°, realise that there can only be one solution for the other angles.