What does anything to the power of zero equal  1 eg 5^{0} = 1 h^{0} = 1 
What does a number to the power of 1 equal?  the number eg 5^{1} = 5 
What does a negative power equal?  The reciprocal. ie turn it upsiode down. 
What does 'power of a half' mean?  square root 
What does power of one third equal?  cube root 
What does power of one quarter equal?  4th root 
What is 'the difference of 2 squares'?  a^{2}  b^{2} = (a+b)(ab) 
How do you solve a quadratic graphically?  Draw the graph. Write down the x values where the curve crosses the x axis. 
What is the formula for perpendicular gradients?  m1.m2 = 1 where the gradient of one line = m1 and the gradient of the other line = m2. 
What is the gradient formula for parallel lines?  m1 = m2 where m1 and m2 are the gradients of the two lines. 
How do you prove that 2 triangles are congruent?  SSS, SAS, ASA, AAS or RHS 
What are congruent shapes?  shapes that are identical in shape and size. 
What is the formula for the Sin of angle 'a'?  Sin(a) = Opp/Hyp NB O S H 
What is the formula for the Cos of angle 'a'?  Cos(a) = Adj/Hyp NB A C H 
What is the formula for the Tan of angle 'a'?  Tan(a) = Opp/Adj NB O T A 
What is the made up word to help you remember the three trigonometric facts?  SOHCAHTOA NB remember it as: O A O S H C H T A 
What is the formula for P(A or B)?  P(A) + P(B) 
What is the formula for P(A and B)  P(A) x P(B)
