Answer:
240 cm²
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This one is pretty simple, the triangle that sits on the upper left side of the shape fits right where there is a missing triangle shape on the upper right side. So just simply add 5.5 and 6.5 to get the total height of the figure and multiply it by the width (20).
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5.5 cm + 6.5 cm = 12 cm
↓
12cm × 20 cm = 240 cm²
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Your answer is 240 cm²
Have a great day!
~Siascon~
