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Question 1
2 marksA right-angled triangle is shown. The vertical side is labeled 20 cm. The hypotenuse is labeled x x\,x cm. The angle at the bottom right vertex is labeled 35∘35^\circ35∘. A small square at the bottom left vertex indicates a right angle.
When labelling a right-angled triangle, which side is fixed no matter which angle θ\thetaθ you choose?
Revision notes for Edexcel GCSE Maths SOHCAHTOA (Trigonometry). Open the guide for explanations and worked examples. Written against the Edexcel GCSE Maths (1MA1) specification, so the content matches what's examinable rather than general Maths background.
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In right-angled triangle ABCABCABC, angle BBB is 90°90\text{°}90° and you are working from angle AAA. Which side is adjacent to angle AAA?
