What is the area of the trapezoid?
5 km
4 km
13 km
9 km

Answer:
21 km²
Step-by-step explanation:
A = ᵃ ⁺ ᵇ/2 (h)
A = 5 + 9/2 (3)
A = 14/2 (3)
A = 7 x 3
A = 21 km²