Area Of Trapezoid (Decompositon Of Areas) Worksheet

8 problems

In 6th Grade geometry, the area of a trapezoid is a fundamental concept. Teachers can use  “area of trapezoid (decomposition of areas) worksheet” to help students understand this concept. Using the decomposition of areas, the trapezoid is breakdown into simpler shapes whose areas can be easily calculated. After calculating the areas of these simpler shapes students needs to add them together to find the area of the original trapezoid.


Grade 6

For example: What is the area of the given trapezoid?





The given trapezoid is breakdown into 3 shapes, 1 rectangle, and 2 triangles.

For rectangle:

Length = 7 ft

Width = 6 ft

Area = Length * width = 7 * 6 = 42 ft^2


For the first triangle:

Base = 3 ft

Height = 7 ft

Area of first triangle = ½ * base * height = ½ * 3 * 7 = 10.5 ft^2


For the second triangle:

Base = 3 ft

Height = 7 ft


Area of second triangle = ½ * base * height = ½ * 3 * 7 = 10.5 ft^2


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