Area and Circumference Formula of Trapezoidal

Trapezoid there are 3 kinds, including:
1. Trapezoid Any
An arbitrary trapezoid has only parallel sides.

2. Trapezium Equal Legs

Characteristics:

Has one pair of parallel sides.
Has one side pairs of the same length (trapezoidal foot AD = BC).
Has two pairs of angles equal ∠A = ∠B = x and ∠D = ∠C.

3. Trapezoidal Bracket

Trapezoidal bracket is a trapezoid whose two corners are elbow.

Formula of Trapezoidal Area

Trapezoidal Area = 1/2 (number of parallel sides) x height

Example Question of Trapezoidal Area

Please determine the trapezoidal area with parallel sides of 12cm and 18cm each and 10cm in height!

Answer:
Number of parallel sides = 12cm + 18cm = 30cm
Height = 10cm

Trapezoidal Area = 1/2 (number of parallel sides) x height
Trapezoidal Area = 1/2 (30cm) x 10cm
Trapezoidal Area = 1/2 x 300cm²
Trapezoidal Area = 150cm²

So the trapezoidal area is 150cm²

Formula of Circumference Trapezoidal

Circumference Trapezoidal = The length of the four sides

Example of Circumference Trapezoidal

What is the trapezoidal circumference below!

Answer:
AB = 15cm
BC = 10cm
CD = 27cm
AD = 10cm

Circumference Trapezoidal = The length of the four sides
Circumference Trapezoidal = AB + BC + CD + AD
Circumference Trapezoidal = 15cm + 10cm + 27cm + 10cm
Circumference Trapezoidal = 52cm

So the circumference of the trapezoid is 52cm.

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