Answer:
The correct option is D - acute triangle.
Step-by-step explanation:
A.equilateral - An equilateral triangle has all the sides and angles equal, so this is not the answer.
B.right - A right triangle has a 90 degree angle in it. So this is also not correct.
C.obtuse - Obtuse triangles are those which have angle greater than 90 degrees, so this is also not correct.
D.acute - Acute triangles have all angles less than 90 degrees. So, this is the answer.
E.scalene - A scalene triangle has all three sides unequal but angles can be obtuse or acute. So this is not the answer.
F.isosceles - An isosceles triangle has 2 sides equal. So, this is also not correct.
Therefore, the correct option is D - acute triangle.
