There are three triangles on this page.  Triangles have three straight sides and three angles (or corners).  Try to find all three triangles.  Write a "1" in the first one you find, "2" in the second one, and "3" in the third.  Color the triangles!  You will also find two circles and one rectangle.  More: "These are all triangles"  "Build a triangle." "Meet the triangles!