Teach Genie
Teach it back in your own words, spot gaps, and remember it better.
Question 1
3 marksA triangle is shown with two sides of lengths 13 cm and 10 cm. The angle between these two sides is 100∘100^\circ100∘. The third side of the triangle is labeled x x\,x cm.
Which angle must be known to find a missing side using the Cosine Rule?
Revision notes for AQA GCSE Maths The Cosine Rule. Open the guide for explanations and worked examples. Written against the AQA GCSE Maths (8300) specification, so the content matches what's examinable rather than general Maths background.
1 of 5
Two sides of a triangle are 6 cm and 8 cm, and the angle between them is 50∘50^\circ50∘. Which side can be found directly using the Cosine Rule?
