Report

Finding Areas of Shapes Area of a Triangle Area of Triangle = 1 x Base x Vertical Height 2 Right Angle Vertical Height Base Area of Parallelogram Area of Parallelogram = Base x Vertical Height Vertical Height Base (A Rhombus is a Parallelogram With Equal Sides) Area of Trapezium Area of Trapezium = Average of Parallel Sides x Distance Between Them a h Area = ½ (a + b) x h b Area of Circle Area = Diameter (D) x 2 r Radius (R) = D/2 Circumference = xD Area of Sector x Area of Sector of Angle X = X / 360 x Area of Circle Summary • Exam papers usually have area formulas • You need practise to use them quickly and accurately • In industry area formulas are used to calculate the quantity of materials needed e.g. paint • Sometimes area formulas are used in algebra