To find the area of ABCDE, the two equations you will need are: Rectangle = l • w Triangle = (b • h)/2
Since rectangles are symmetrical, we can ignore the triangle for now.
Observe that the left side of the rectangle states 5 cm, and the bottom side states 12 cm. With this information we can infer that:
Area of rectangle is 12cm(5cm) = 60cm^2
Alright, now we can look at the triangle. What we’ll do is subtract 5cm from 9cm to get the height 4 cm; and we’ll subtract 9 cm from 12 cm to get the base 3 cm.
With this information, we can conclude that the area of the triangle (3cm(4cm)/2 = 6cm^2
Adding both the triangle and rectangle area together, we get 66cm^2
