giúp mình với

To find the area of trapezoid DEF, we can use the formula for the area of a trapezoid: $$ where A is the area, h is the height, and $$ and $$ are the lengths of the parallel sides. First, we need to find the height of trapezoid DEF. We can do this by finding the length of DE using the Pythagorean theorem: $$ $$ $$ $$ $$ Now that we have DE, we can find the area of trapezoid DEF: $$ $$ $$ $$ Using a calculator, we find that $$. Therefore, the area of trapezoid DEF is approximately 84.0 square meters.