Given:
2 shapes are present. 2 Right triangles and trapezoid
Area of right triangle = ab / 2
a = 12 mm
b = 18 mm/ 2 = 9mm
A = (12mm * 9mm)/2 = 108mm²/2 = 54mm²
There are 2 right triangles so; A = 54mm² * 2 = 108mm²
Area of a Trapezoid = (a+b)/2 * h
a = 14mm
b = 18mm
h = 17mm -12mm = 5mm
A = (14mm + 18mm)/2 * 5mm
A = 32mm/2 * 5mm
A = 16mm * 5mm
A = 80mm²
Total Area = Triangles + Trapezoid
T.A. = 108mm² + 80mm²
T.A. = 188mm²