Math yr9

• what is this formula used for?

  Midpoint of a line

  
• y=mx+c, where "m" is the gradient and "c" is the y-intercept.
• m=(y2-y1)divided by (x2-x1) is the formula for the gradient when a line passes through two points.
• The formula for the area of circle is πr^2
• The formula for the circumference of a circle is C=2 x pie x r
• Area for parallelogram is A=bh
• The area for the trapezium is 1/2 x (short width + long width) x height.