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 ▸Expand and simplify (x − 4)(2x + 3y)^2
Solve the simultaneous equations; 2x + y = 18; x + 3y = 19.
Frank, Mary and Seth shared some sweets in the ratio 4:5:7. Seth got 18 more sweets than Frank. Work out the total number of sweets they shared.
How do I rationalise the denominator? (Surds)