Answer:
answer is D
Step-by-step explanation:
equilateral : having all its sides of the same length
isosceles acute : triangles are the triangles with all their internal angles being acute angles and only two sides equal to each other in length.
isosceles right : a right triangle that has of two equal length legs. Since the two legs of the right triangle are equal in length, the corresponding angles would also be the same
scalene acute : all sides have different lengths
