Answer:
Option D, isosceles right triangle
Step-by-step explanation:
Step 1: Use logic
Looking at the given points, we know that there are 3 points which means that this is going to be a triangle. This removes options B and C from the mix and we are only left with A and D.
Isosceles right triangle means that the two legs next to the right angle are equal to each other. Scalene right triangle means that the two legs next to the right angle are different from each other. We can see that the distance between (1, 1) and (1, 4) is 3 units and the distance between (1, 1) and (4, 1) is also 3 units. Therefore this is an isosceles right triangle.
Answer: Option D, isosceles right triangle
