Answer:
246meter square
Step-by-step explanation:
Area of a trapezium is calculated using the formula
Area = 1/2 ( A+B) x height
where A is the one of the horizontal sides (18m) and B is the other horizontal (23m) side and height is vertical side (12m)
Area = 1/2 (18m + 23m) x 12m
Area = 1/2 (41m) x 12m
Area = (1 x 41 x 12) / 2
Area = 492/2 = 246 meter square
