A statement that two ratios are equal.
The ratio of the lengths of two corresponding sides.
The product of the means is equal to the product of the extremes.
A rectangle that can be divided into a square and a rectangle that is similar to the original triangle.
Corresponding angles are congruent and corresponding sides are in proportion.
Two triangles are similar if two pairs of corresponding angles are congruent.
Two triangles are similar if an angle of one triangle is congruent to an angle of a second triangle, and the sides including those angles are in proportion.
Two triangles are similar if the corresponding sides of two triangles are in proporiton.
If a line is parallel to one side of a triangle and intersects the other two sides, then it divides those sides proportionally.