Find the area of quadrilateral ABCD.

The correct answer is B. 14.89 units squared.

Find the area of each triangle and add them together. Heron’s formula explains it better than me. Lol

           14.89 units²

Step-by-step explanation:

We can use Heron's formula to calculate area of triangles:

  where:

a, b, c  - sides of triangle

s  - semi-perimetr of triangle  {(a+b+c):2}

ΔACD:

a = 4.39 ,   b = 3.42  ,  c = 4.57

s = (4.39 + 3.42 + 4.57)÷2 = 12.38÷2 = 6.19

ΔACD:

a = 5.44 ,   b = 7.84 ,   c = 3.42

s = (5.44 + 7.84 + 3.42)÷2 = 16.7÷2 =

Whose mistake? can you give more details to what the question is asking?

31/6= 19/6 19/6 *1/7=19/42