Step-by-step explanation:
Since the given figure is a trapezium,
Hence, Length of the parallel sides = 12mm , 18 mm
Height of the trapezium = 11mm
Therefore area of the trapezium =
[tex] \frac{1}{2} \times (a + b) \times h[/tex]
[tex] \frac{1}{2} \times (12mm + 18mm) \times 11mm[/tex]
[tex] \frac{1}{2} \times 30mm \times 11mm[/tex]
[tex]15mm \times 11mm[/tex]
[tex]165 {m}^{2} [/tex]
Length of the non parallel sides = 13mm , 14mm
Hence, perimeter of the trapezium = Sum of all sides
= 12 mm + 13 mm + 14 mm + 18 mm
= 57 mm
