Answer:
A= 120ft^2
Step-by-step explanation:
In the smaller triangle the base is 10. The larger is twice as much as that base. So the height must be twice as much as the smaller (6 x 2 = 12)
b=20
h=12
SO..
A= bh/2
20(12)/2
240/2
A=120
Hope this helped!!!
