Question

What is the area of rhombus ABCD ?

Answer 1

check the picture below.

so, notice there, the rhombus is really just two triangles, each triangle has a base of 4 units and a height of also 4 units, so simply let's get the area of a triangle and multiply that times 2.

$\bf \stackrel{\textit{area of 2 triangles}}{2\left[\cfrac{1}{2}(4)(4) \right]}\implies 16$