This means that, using Pythagoras’ theorem, the equation of a ... line that touches the circle at P. The tangent is perpendicular to the radius which joins the centre of the circle to the ...

Find \(\ds \lim_{h\to 0}\frac{f(1+h)-f(1)}{h}\) where \(\ds f(x)=\frac{3x+1}{x-2}\text{.}\) What does the result in (a) tell you about the tangent line to the graph ...

This distance is called the radius. Learn how to measure and calculate ... Scale factors can increase or decrease the size of a shape. Pythagoras' theorem - Edexcel Pythagoras’ theorem can ...