they are sometimes similar because their angles are 90 degrees therefore their angles are proportianite
Two rectangles are seldom but sometimes similar. They can be but they don't have to.
Not always, sometimes two obtuse triangles are similar and sometimes they are not similar.
If two rectangles are similar, they have corresponding sides and corresponding angles. Corresponding sides must have the same ratio.
always
It is sometimes true that two parallelograms are similar. The could be congruent, or dissimilar in that one is not an enlargement of the other.
Two rectangles are seldom but sometimes similar. They can be but they don't have to.
Not always, sometimes two obtuse triangles are similar and sometimes they are not similar.
Two rectangles are similar if corresponding angles are equal and the corresponding sides are proportional.
Two equilateral triangles are always similar!
If two rectangles are similar, they have corresponding sides and corresponding angles. Corresponding sides must have the same ratio.
No.
Sometimes.
It is sometimes true that two parallelograms are similar. The could be congruent, or dissimilar in that one is not an enlargement of the other.
Sometimes. Remember, in order for two polygons to be similar, their angles must be congruent, and their corresponding sides must be proportional. In a rhombus, it is always possible for the angles to differ.
Yes
They're sides may not be congruent.
I guess you mean the ratio of the areas; it depends if the 2 rectangles are "similar figures"; that is their matching sides are in the same ratio. If they are similar then the ratio of their areas is the square of the ratio of the sides.