Question 6 According to the calculation formula of triangle area, the basic conditions for understanding triangle area equality are equal base (the base of two triangles * * *) and equal height (the vertical distance between parallel lines is equal).

Question 7 is to divide triangles by using the principle that the areas of triangles with equal bases and equal heights are equal.

Method 1:

Divide any side of a triangle into four segments, and connect each point with the corresponding vertex to form four triangles with equal area.

Method 2:

The midpoints of three sides of a connecting triangle form four triangles with equal areas.

According to the properties of the median line in the triangle, it can be proved that these four triangles are equal in base and equal in height. But students don't have these knowledge bases, and they can prove that the base and height of each triangle are equal through measurement.