for The Shape Family Babies by Kristin Haas and Shennen Bersani
Mr. and Mrs. Shape are expecting a baby, but they are surprised when three arrive! The first is just like Mother Rhombus, the other just like Father Rectangle, the third baby is a different shape. What should her name be? Go on a geometry naming adventure as all the shape family relatives weigh in. Will Cousin Triangle, Aunt Hexagon or Grandma Rhombus have the right angle?