(redo for the mistake) + 5 points (also how do I delete may last mistake)

The picture below shows rhombus ABCD with side length 3.16. EC=1 and ED=3.
Find the area of ABCD

redo for the mistake 5 points also how do I delete may last mistake The picture below shows rhombus ABCD with side length 316 EC1 and ED3 Find the area of ABCD class=