Answer:
{2/3 ; -1}
Step-by-step explanation:
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Answer:
Step-by-step explanation:
(1). ( - 3, - 1 )
(2). ( - 1, 3 )
(3). ( 2, 0 )
(4). ( 1, 0 )
You take add all the measures up and make sure their equal to 180.