Title: The Greedy Triangle
Author: Marilyn Burns
Illustrator:
Gordon SilveriaAuthor: Marilyn Burns
Recommended Grade Level: PreK-2nd
CCSS.Math.Content.2.G.A.1
Recognize and
draw shapes having specified attributes, such as a given number of angles or a
given number of equal faces.1 Identify triangles, quadrilaterals,
pentagons, hexagons, and cubes.
CCSSM Mathematical Practice:
CCSS.Math.Practice.MP5 Use appropriate tools strategically.
Mathematically proficient students consider the available tools when
solving a mathematical problem. These tools might include pencil and paper,
concrete models, a ruler, a protractor, a calculator, a spreadsheet, a computer
algebra system, a statistical package, or dynamic geometry software.SM Standard
for
Summary: There once was a triangle who grew tired of his shape, angles and sides. He decided he wanted to be made into a new shape so he went to the shapeshifter who kept making him into all kinds of new shapes and sides. What once was a triangle has now become a decagon who could no longer recognize himself because of how greedy he was.
Rating: *****
I give this book five stars because it is a colorful child friendly book, which illustrates everyday items and taps into a child’s experience to explain different types of polygons. It starts with a simple triangle and increases by one angle and side to continue to teach and give examples of each shape.
Classroom
Ideas/Lesson Ideas: I plan to use this book to introduce polygons starting
with triangles. I will introduce the total number of sides and angles it has.
From there I will discuss each new polygon as I increase each shape by a side
and an angle. The students will then be able to learn about triangles,
quadrilateral, pentagon, hexagon, heptagon, octagon, nonagon, and decagon.



