ANSWER - 12 units²
Explanation:
We need to use Area of triangle formula in triangles ABD & CBD.
Applying the formula of area of triangle, that is, 1/2 × BASE × HEIGHT
In triangle ABD,
1/2 × 4 × 4 = 8 units²
In triangle BCD,
1/2 × 2 × 4 = 4 units²
Adding both the areas of the triangle, we get 12 units².
Hope it helps :)