Which of these statements is true for all parallelograms? A. the opposite angles are congruent
B. diagonals are congruent
C. the area is equal to the product of two adjacent sides
D. the diagonals are perpendicular to each other

A)  opposite angles are congruent

Step-by-step explanation:

fa tha first one you gonna add y to both sides

it look like this

x-y+y=6+y

x=y+6

therefore your answer is

x =y+6

fa tha second one

you gonna flip tha equation

it gonna look like x-4y=y

then add 4 to both sides

it gonna look like tha

x-4 +4 =y +4

so therefore tha answer is x=y+4

step-by-step explanation:

so what is the problem what are they asking you to solve

step-by-step explanation:

so what is the problem what are they asking you to solve