Q.Are there any other kind of scalene triangles?
A.Yes, there is a right-angled scalene triangle, which has one right angle.

Q.What else?
A.An obtuse-angled scalene triangle, which has one obtuse angle.

Q.Can an acute triangle be an equi-lateral triangle?
A.Yes, it may be equilateral, isoceles, or scalene.

Q.Can a right-angled triangle, or an obtuse-angled triangle, be an equilateral?
A.No; it must be either an isoceles or a scalene triangle.
_Square_.
Q.What is this?
A.A square.

Q.Why is it called a square?
A.Because all its angles are right angles, and its sides are equal.