“one arm of a right angle is perfectly horizontal, the other is perfectly vertical“
Squares, Rectangles, and Other Quadrilaterals | 
“one arm of a right angle is perfectly horizontal, the other is perfectly vertical“
I would use this when discussion math topics in the classroom because it helps children understand the properties of these shapes, such as their sides and angles, in an accessible and engaging way. The book is an excellent resource for teaching basic geometry concepts to early learners.
pickSquares, Rectangles, and Other Quadrilaterals by David A. Adler is a nonfiction children's book that introduces young readers to the concept of quadrilaterals, a type of polygon with four sides. Through clear, simple explanations and colorful illustrations, the book explores different types of quadrilaterals, including squares, rectangles, parallelograms, and rhombuses.
