Verified Answer :

meerkat18

Given:
height : 3 feet
base : 19 feet

Area of a triangle = (height base) ÷ 2
A = (3 ft 19 ft) ÷ 2
A = 57 ft² ÷ 2
A = 28.5 ft²

The area of the figure is 28.5 ft². Choice A.
A28.5 ft^2 Hope this help. Have a nice day, Need any more help with Geometry just message me. 

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