maths

• alternate angles


  equal
• corresponding angles


  equal
• Co-interior angles

  sum up to 180 degrees
• angles on a straight line sum up to


  180 degrees
• angles around a point sum up to


  360 degrees
• angles in a triangle sum up to


  180 degrees
• angles in a quadrilateral sum up to

  360 degrees
• exteriour angles 


  360

  n
• interior + exterior=


  180
• sum of the interiour


  180 x (n-2)
• interior 


  180 x (n-2)

  n
• area of a circle


  pi r squared
• circumference of a circle


  pi d
• area of a triangle

  base x height

  2
• km-m

  x1000
• m-cm

  x100
• cm-mm

  x10
• cm-m

  divide by 100