All equilateral triangles are

If a line divides two sides of the triangle in the _____ ratio, the line is parallel to the third side.

Ratio of _____ of two similar triangles is equal to the ratio of the squares of their corresponding sides.

If the bisector of an angle of a triangle bisects the opposite side, then the triangle is:

In a triangle, the perpendicular from the vertex to the base bisects the base. The triangle is:

If the diagonals of a quadrilateral divide each other proportionally, then it is a: