Answer: (-3,3) is the answer
(opposite angles in a parallelogram)
(subtraction)
(angles in a triangle add to 180 degrees)
(adjacent angles in a parallelogram are supplementary)
(subtraction)
(angles in a triangle add to 180 degrees)
(angles on a straight line add to 180 degrees)
Answer:
150 This is right 4sure i did this test to.
Step-by-step explanation:
They are all eawualateral