Grade 2 topics

• formula for Area of square is:

  base x height
• Formula for area of triangle is:

  (base x height)/2
• Formula for area of trapezium is:

  (a+b)/2 x height
• Formula for area of parallelogram is:

  Base x perpendicular height
• Formula for area of rhombus:

  length x height / 2
• Formula for area if kite is:

  Length x height / 2
• How to plot frequency polygon:

  find the midpoint of the class width in the left, and plot it against the frequency with straight lines
• To draw a pie char:

  • find the total frequency by adding
  • all The angled around a point add up to 360 degrees
  • work out a multiplier by finding what you multiply the total frequency by to get 360.
  • multiply each frequency by the multiplier
  • draw the new angles onto the circle with a protractor
  • make sure the middle Of the protractor lines up with the middle of the circle