by Rebecca Kai Dotlich
photographs by Maria Ferrari
HarperCollins, 2000
ISBN 978-0-694-01392-7 (hardcover)

What is a triangle? Help your child trace the edges of the triangles on each age and count the sides out loud. Encourage your child to find other triangular shapes at home. Make it fun! Point out different shapes on signs, vehicles, and buildings around your neighborhood.

Dedication
"For my triangle of niece and nephews and their gorgeous gang of 'grands': Isabelle, Luke, Amanda, Derek, Nathan, and Lindsey."

Reviews
Like its companions, What Is Round and What Is Square (both HarperCollins, 1999), this book features a rhyming text accompanied by colorful photos of common objects set against bright backgrounds. The roof of a house made with blocks, a wedge of cheese, and a toy boat's sail are clear examples of triangles for toddlers.

—Ellen Heath, School Library Journal