**Learning Target:** Work with triangles in order to explore their angle relationships.

**Handouts:** Triangle Similarity (Turn in: Thurs, 6/1)

Today we worked with similar polygons. Remember, similar polygons have the same shape but are different sizes – like when we drew dilations in our last unit! You already know that if you have two similar triangles, you can use the scale factor to find the unknown side lengths. Today though, we worked with similar triangles and our focus was on their interior angles.

My demonstration in class showed you that when you enlarge or shrink a triangle, even though the side lengths changes, the angles all stay the same! So if each of the angles in one triangle have the same measure as each of the angles in another triangle, then the two triangles are similar. We don’t even need to look at the lengths of the sides!

As you worked through the classwork, you found a shortcut with the angles on #2. You found that if a pair of triangles have two angle measures in common, then the third angles must be equal too! Therefore, when you have a pair of triangles with two sets of equal angles, then the two triangles are similar!

Your homework is to make sure you have #1-7 complete.