Answer:
113.1ft²
Step-by-step explanation:
Height of bottom box : -

Height of top box : -

Thus, height of two boxes =

Happy to help chodini!
Answer: 18
Step-by-step explanation: The formula for calculating a triangle’s area is 1/2(base•height). This means that 12•3 is 36, which multiplied by 1/2 is 18.
(Hope this helps)