Answer:
350 square feet.
Explanation:
To calculate the area of the whole tree house, we can divide it into smaller shapes, find the area of each shape and add up their results.
Back porch is a square so its area will be = 6 x 6 = 36 square feet
Side deck is a rectangle so its area will be = 3 x 14 = 42 square feet
Playroom is also a rectangle so its area will be = 14 x 16 = 224 square feet
We already know the area of the entry terrace to be 48 square feet, therefore the total area of the tree house will be 36 + 42 + 224 + 48 = 350 square feet.