How do I know whether to add or minus in Pythagoras's theorem?
Firstly it has to be a right angled trinagle. Even if it is an irregukar shape, draw a line in to make it a right angled triangle. When you have your right angled triangle remember it is ALWAYS + if it is the hypotenuse (longest side) and - if it is not the hypotenuse.
NM
Related Maths GCSE answers
All answers ▸Solve the following for X and Y: 2y+4x=14 and x-y=-1
a)Rearrange the folowing to make m the subject; 4(m-2) = t(5m+3)
Please explain (said question) surrounding a proof of 2 equal angles
The functions f and g are such that f(x)=5x+2 and g(x)=-x-4. a) Find fg(x). b) Find ff(x). c) Solve fg(x) = ff(x).