## Similar Triangles
if they have the same angles. Their sides don't have to be the same length. The ratio of their corresponding sides is called the scale factor. So, the two triangles here are similar similar because they have the same angles. The sides of the bigger one are twice the length of the sides of the little one, so their scale factor is 2.
This is sorta like congruent triangles, except congruent triangles have to be the same size. Just like with congruent figures, they can be turned in any relationship to each other, even mirror images.
Note: Other shapes can be similar too, like rectangles, circles and combined shapes, like a triangle with a rectangle. |