Count sides and vertices

Learning Objectives Identify a side on a 2D shape. Identify a vertex on a 2D shape. Count the sides of a triangle, square, and rectangle. Count the vertices of a triangle, square, and rectangle. Explain that a circle has 0 sides and 0 vertices. State that the number of sides equals the number of vertices for many shapes. Have you ever noticed the pointy corners on a slice of pizza? 🍕 Let's learn what they are called! Today, we will learn about sides and vertices. These are special parts of shapes. Knowing them helps us name all the shapes we see! Real-World Applications Finding shapes in your classroom window 🖼️ Building with toy blocks 🧱 Looking at street signs 🛑 Drawing a house with a triangle roof 🏠

TermDefinitionExample SideA side is a straight line that makes up part of a shape.The edge of a book is a side. 📖 VertexA vertex is a corner where two sides meet. It's a pointy part!The corner of a block is a vertex. 🎲 TriangleA shape that always has 3 sides and 3 vertices.A slice of watermelon is a triangle. 🍉 SquareA shape with 4 equal sides and 4 vertices.A cheese cracker is a square. 🧀 RectangleA shape with 4 sides and 4 vertices. It has two long sides and two short sides.A door is a rectangle. 🚪 CircleA perfectly round shape. It has no straight sides and no vertices.A cookie is a circle. 🍪

The Matching Rule Number of Sides = Number of Vertices For shapes with straight sides, the count of sides and vertices is always the same! It's like they are best friends. The Circle Rule Circle Sides = 0, Circle Vertices = 0 A circle is special. It is made of one curved line, so it has no straight sides and no pointy corners.