4: A=½bh
A=½(18)(14)
A=½(252
A=125m²
126÷3= 42
42 chickens
5: A=½h(a+b)
A=½(3)(4+3)
A=½(3)(7)
A=½(21)
A=10.5m²
step-by-step explanation:
oof the porridges