Answer:
2
Step-by-step explanation:
there is 2: 3<u> 1 </u>
4
..........................................
Given
Given

SolutionStep 1Find slope


Substitute the given points into the slope formula

step 2Equation of a line


Step 3

The final answerOption B
Step-by-step explanation:
the first one is acute equilateral
the second one is obtuse scalene
the third one is right scalene
the fourth one is obtuse isosceles