Question

The vertices of rhombus DEFG are D(1, 4), E(4, 0), F(1, –4), and G(–2, 0).

Answer 1

The length of DE=sqrt((1-4)^2+(4-0)^2)=sqrt(3^2+4^2)=5
In principle, a rhombus has four equal sides, so the perimeter is 4*5=20 (units)

However, to ensure there is no typo, it is advisable to calculate separately the length of each and every side.

Answer 2

Answer:

the answer is "20