Which of the following is NOT true about a rhombus? The diagonals bisect each other.
The diagonals are perpendicular.
All sides are congruent.
The diagonals are not congruent.

The diagonals are not congruent should be the answer...

Step-by-step explanation:

Might wanna get another opinion but im pretty sure im right.

answer:   28.56 feet (approx)

step-by-step explanation:

since, triangle abc has measure of angle c equal to 55 degrees, measure of angle abc equal to 90 degrees, and length of bc equal to 20 feet.

we have to find out the measurement of segment ab.

therefore, tan 55° =

but bc = 20 feet.

⇒ tan 55 ° =  

⇒ ab = 20 × tan 55 °

⇒ ab = 20 × 1.42814800674

⇒ ab = 28.5629601348   ≈ 28.56 feet