This medium worksheet asks shape detectives to count attributes precisely. Part A's nine fill-in-the-blanks cover a cube's 6 faces and 12 edges, a triangle's 3 sides and 3 corners, a rectangle's 4 corners, a cone's 1 vertex at the top, and a cylinder's 2 flat faces with 1 curved surface. Part B is a four-pair matching grid that pairs cube, sphere, cone, and cylinder with '6 faces,' 'no edges,' '1 vertex,' and '2 flat faces.' Counting edges and vertices on the same shape twice helps first graders separate the two terms that confuse them most.