Which properties are best used prove a quadrilateral is a square? a) Adjacent sides are perpendicular.

b) Diagonals are congruent.

c) Diagnonals are congruent and perpendicular.

d) Opposite sides are parallel and congruent.

a, b, c, & d

Step-by-step explanation:

a

step-by-step explanation:

when a number is between two straight lines it means the absolute value.

to find absolute value you need to know how many numbers is that number away from 0.

when finding absolute value the number will always come out positive

so absolute value of -3 is 3

absolute value of 3/2 is 3/2

absolute value of -2 is 2

absolute value of 3.5 is 3.5

absolute value of -1 is 1

now put these numbers in order:

a)   |-1|, |3/2|, |-2|, |-3|, |3.5|