Answer: Scalene
Explanation:
A Scalene triangle has no equal sides or angles. There’s nothing congruent in the triangle above.
It’s not the others because:
1) Right - there’s no 90 degree angle
2) Equilateral- all the sides have to be the same, in the image all sides are different.
4) isosceles- base angles have to be congruent just like the sides connected to the vertex.
Hope this explains why the others are wrong! Vote the best!