Is it possible to create a quadrilateral with: • four 90º angles
• and not all four sides are congruent

Yes a rectangle I guess

Yes, it is.

Step-by-step explanation:

Think about it!

A rectangle has 4 90˚ angles, however all the sides aren't equal.

Hope this helps!

c) yes, because of asa or aas

12r - 8 - 12

you have to combine like terms. below i have bolded the like terms:

12r - 8 - 12

together it combines to:

12r - 20

hope this !