What exactly is pi?
Pi is the ratio between a the circumference and the diameter of a circle. It's just a number which happens to describe this ratio for any circle you can think of. Let me explain, using the whiteboard...
HB
Related Maths GCSE answers
All answers ▸Solve the simultaneous equations: (a) y - 2x = 6; (b) y+2x = 0.
There are "n" sweets in a bag, six are orange and the rest are yellow. If you take a random sweet from the bag and eat it. Then take at random another one and eat it. The probability of eating two orange sweets is 1/3. Show that n²-n-90=0.
Factorise and solve x2 - 8x + 15 = 0
Factorise y^2 + 7y + 6