![A=(1,2)\\B=(0,-1)\\\overrightarrow{AB}=((0,-1)-(1,2)=(-1,-3)\ ||\overrightarrow{AB}||^2=1+9=10\\\overrightarrow{BC}=((3,-2)-(0,-1)=(3,-1)\ ||\overrightarrow{BC}||^2=9+1=10\\\\Triangle\ is\ isosceles.\\\\\overrightarrow{AB}.\overrightarrow{BC}=(-1,-3)*\left[\begin{array}{c}3\\-1\end{array}\right] =-3+3=0\\\\Triangle \ is\ right.\\\\](/tpl/images/1408/9078/2f266.png)
Help anyone can help me do the question 4,I will mark brainlest.
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Mathematics, 14.08.2021 16:30, kadinmorgan
Help anyone can help me do the question 4,I will mark brainlest.
Answers: 2
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